Effects of executive load on crashes and near-crashes for young versus older drivers

With the increasing use of infotainment systems in vehicles, secondary tasks requiring executive demand may increase crash risk, especially for young drivers. Naturalistic driving data were examined to determine if secondary tasks with increasing executive demand would result in increasing crash risk. Data were extracted from the Second Strategic Highway Research Program Naturalistic Driving Study, where vehicles were instrumented to record driving behavior and crash/near-crash data. executive and visual-manual tasks paired with a second executive task (also referred to as dual executive tasks) were compared to the executive and visual-manual tasks performed alone. Crash/near-crash odds ratios were computed by comparing each task condition to driving without the presence of any secondary task. Dual executive tasks resulted in greater odds ratios than those for single executive tasks. The dual visual-manual task odds ratios did not increase from single task odds ratios. These effects were only found in young drivers. The study shows that dual executive secondary task load increases crash/near-crash risk in dual task situations for young drivers. Future research should be conducted to minimize task load associated with vehicle infotainment systems that use such technologies as voice commands.

Young drivers' early access to their own car and crash risk into early adulthood: Findings from the DRIVE study

INTRODUCTION

Car ownership at early licensure for young drivers has been identified as a crash risk factor, but for how long this risk persists is unknown. This study examined crash hazard rates between young drivers with their own vehicle and those who shared a family vehicle at early licensure over 13 years.

METHODS

The DRIVE study, a 2003/04 survey of 20,806 young novice drivers in New South Wales, Australia was used to link to police crash, hospital and death records up to 2016. The first police-reported crash and crash resulting in hospitalisation/death was modelled via flexible parametric survival analysis by type of vehicle access at baseline (own vs. shared family vehicle).

RESULTS

After adjusting for covariates, drivers with their own vehicle at early licensure had an almost 30 % increased hazard rate for any crash after one year (95 % CI:1.16-1.42) compared with those who only had access to a family car and this attenuated but remained significantly higher until year 7 (HR: 1.1, 95 % CI: >1.00-1.20). For crashes resulting in hospitalisation or death, an almost 15-times higher hazard (95 % CI: 1.40-158.17) was observed at the start of follow up, remaining 50 % to year 3 (95 % CI:1.01-2.18).

CONCLUSIONS

Parents and young drivers should be aware of the increased risks involved in car ownership at early licensure. Development of poorer driving habits has been associated with less parental monitoring at this time. Graduated Driving Licensing educators, researchers and stakeholders should seek to address this and to identify improved safety management options.

A randomized controlled pilot trial of brief online mindfulness training in young drivers

OBJECTIVE

Driver distraction contributes to fatal and injury crashes in young drivers. Mind wandering (MW) is a covert form of distraction involving task-unrelated thoughts. Brief online mindfulness training (MT) may reduce unsafe driving by enhancing recognition (meta-awareness) of MW and reducing its occurrence. This pilot trial tested these proposed mechanisms of MT and explored its specificity of action, effects on driving behaviour in simulation, as well as intervention adherence and acceptability in young drivers.

METHODS

A pre-post (T1, T2), randomized, active placebo-controlled, double-blinded design was used. Twenty-six drivers, aged 21-25, received either brief online MT (experimental) or progressive muscle relaxation (PMR, control) over 4-6 days. A custom website blindly conducted randomization, delivered interventions, administered questionnaires, and tracked adherence. At T1 and T2, a simulator measured driving behaviour while participants indicated MW whenever they recognized it, to assess meta-awareness, and when prompted by a thought-probe, to assess overall MW.

RESULTS

MT reduced MW while driving in simulation. The MT group reported higher state mindfulness following sessions. Motivation did not account for MW or mindfulness results. MT and meta-awareness were associated with more focus-related steering behaviour. Intervention groups did not significantly differ in adherence or attrition. No severe adverse effects were reported, but MT participants reported more difficulty following intervention instructions.

CONCLUSION

Results support a plausible mechanism of MT for reducing MW-related crash risk (i.e., reduction of MW) in young drivers. This preliminary evidence, alongside promising online adherence and acceptability results, warrants definitive efficacy and effectiveness trials of online MT.

Parenting in the context of driving: Spanish adaptation of the Family Climate for Road Safety (FCRSS) for parents and children

The Family Climate for Road Safety Scale (FCRSS; Taubman - Ben-Ari & Katz - Ben-Ami, 2013) is a comprehensive measure originally developed in Israel to assess parent-children relations in the specific context of driving. The scale consists of seven dimensions: Modelling, Feedback, Communication, Monitoring, Messages, Limits, and Non-commitment to Safety. While the original FCRSS examines the young drivers' perception across the seven domains, a version applicable to parents has also been developed by the same authors. The current study investigates the validity and reliability of the FCRSS-Spain for both parents and young drivers. A total of 377 parents (199 fathers and 178 mothers) and 243 of their children (143 daughters and 100 sons) responded to the FCRSS-Spain versions and provided sociodemographic data. In addition, the young drivers completed the Spanish version of the Multidimensional Driving Style Inventory (MDSI-Spain). Results from exploratory structural equation modelling (ESEM) indicate that six out of the seven FCRSS domains were replicable among Spanish drivers. The Messages dimension did not emerge as a consistent factor in the FCRSS for either parents or young drivers. All six factors demonstrated good internal consistency reliability (ordinal alpha coefficients exceeding 0.70), except for Non-commitment to safety. Significant differences were found between mothers and fathers in various FCRSS dimensions in the predicted direction, whereas no significant differences in FCRSS scores were found between young men and young women. As expected, associations were found between parents' scores in various FCRSS dimensions and the reckless, angry, dissociative, anxious, and careful driving styles reported by the young drivers, as well as between young drivers' FCRSS scores and their self-reported reckless, angry, dissociative, anxious, and careful driving styles.

Targeting young driver emotions can reduce their cellphone distractions

OBJECTIVE

This study sought to evaluate the relationship between young drivers' intention to engage in cellphone distractions while driving and their emotions towards the associated risks. First, we assessed whether the emotions of guilt, shame, and fear are associated with young drivers' intention to engage in cellphone distractions, through an extended Theory of Planned Behavior (TPB) model. Second, we evaluated whether road signs that may evoke these negative emotions reduce cellphone use intentions among young drivers.

METHODS

An online survey was conducted with young drivers (18 to 25 years old) from Ontario, Canada. 403 responses were collected, of which, 99 responses were used to evaluate the first objective and all 403 responses were used to evaluate the second objective.

RESULTS

Anticipating feelings of guilt, shame, and fear negatively predicted the intention to engage in cellphone distractions, above and beyond the standard TPB constructs (i.e., attitudes, subjective norms, and perceived behavioral control). When prompted with potentially emotion-evoking road signs (children crossing, my mom/dad works here), an increase in anticipated feelings of these emotions corresponded with lower intention to engage in cellphone distractions.

CONCLUSION

Countermeasures that target young driver emotions toward distracted driving risks may be effective in reducing their distraction engagement. Future studies in more controlled environments can investigate causal relationships between emotions and distracted driving among young drivers.

Learning With a Supervisor Who has Traffic Offences and Young Driver Crashes: The DRIVE Study 13-Year Follow-Up

PURPOSE

Young learner drivers commonly must record substantial supervised practice driving before independent licensure. Supervisory driver requirements can be limited or highly regulated, yet research is lacking on the effectiveness of different approaches. The current objective was to explore whether young drivers who were mostly supervised by someone who they perceived had traffic offences versus no offences had different crash records over a period of 13 years postlicensing.

METHODS

DRIVE is an Australian prospective cohort study of more than 20,000 drivers who were aged 17-24 years and newly licensed during 2003-2004. They completed detailed baseline questionnaires, including whether the person they identified as supervising their learner driving the most had perceived traffic offences in the past 12 months. Responses were linked to their state crash, hospitalization, and death records to 2016. A parametric survival model was created to calculate hazard ratios of time to crash for those reporting that their supervisor had 0 versus 1 and 0 versus 2+ perceived offences, adjusting for the participants' prior crash history and other covariates.

RESULTS

After adjusting for covariates, 369 participants reporting supervisory drivers with 2+ perceived offences, compared to 15,451 participants reporting no such offences, had up to 1.67 (95% confidence interval 1.10-2.53 at 6 months) times the rate of any crash for the first 2.5 years and up to 2.01 (95% confidence interval 1.26-3.19 at 3.5 years) times the rate of crashes resulting in injury for 5.5 years.

DISCUSSION

Although overall supervision by a driver with two or more perceived offences was low, further attention is needed to ensure improved supervised driving experiences, with mentoring programs and professional instructor partnerships worthy of exploration.

Personalized driving safety: Using telematics to reduce risky driving behaviour among young drivers

INTRODUCTION

The role of real-time data capture (via telematics technology) is gathering prominence as a strategy to provide feedback to young drivers about important road safety issues.

METHOD

A naturalistic driving study was undertaken to determine whether providing personalized feedback (via a smartphone app) to young provisional drivers aged 17-20 years living in metropolitan and regional Western Australia (WA) reduced their risky driving behavior compared to a control group who did not receive feedback. Speeding over the posted speed limit, harsh decelerations (braking), harsh accelerations and overall driving performance, were recorded continuously using the smartphone app during the 11-week study. Four separate Generalised Estimating Equations (GEE) linear regression models were undertaken after accounting for relevant confounders including driving exposure to determine the difference between the intervention and control group for the 4 driving outcomes obtained from the smartphone app.

RESULTS

The study found that there was no significant change in overall driving scores between the intervention and control groups (p = 0.35). However, the overall driving score significantly improved by 0.19 points for young provisional drivers who lived in regional areas compared to those in the metropolitan area (p = 0.05) after adjusting for potential confounders. There was also no significant change in harsh braking scores (p = 0.46) and harsh acceleration scores between the intervention and control groups (p = 0.26) However, harsh acceleration scores improved by 0.37 points for females compared to males (p = 0.04). Lastly, there was no significant change in speed scores between the control and intervention groups (p = 0.72). However, the speed scores of participants who lived in regional WA improved by 0.22 points compared to those in the metropolitan area (p = 0.02). Furthermore, for every 1,000 km travelled, speed scores worsened by -0.08 points (p < 0.01) regardless of group.

CONCLUSIONS

The study did not find any statistical difference in the driving outcomes examined; however the treatment effects for feedback were consistently in the expected positive direction. Young drivers in regional WA also improved their speeding scores and overall driving performance scores compared to young drivers in the metropolitan area. Females, also significantly improved their harsh deceleration scores compared to males, regardless of group allocation. These results highlight the use of smartphone telematics as an opportunity to not only enhance the safety of provisional young drivers but also provide data-informed decision making and policy development.

Financial status and travel time to driving schools as barriers to obtaining a young driver license in a state with comprehensive young driver licensing policy

The highest lifetime risk for a motor vehicle crash is immediately after the point of licensure, with teen drivers most at risk. Comprehensive teen driver licensing policies that require completion of driver education and behind-the-wheel training along with Graduated Driver Licensing (GDL) are associated with lower young driver crash rates early in licensure. We hypothesize that lack of financial resources and travel time to driving schools reduce the likelihood for teens to complete driver training and gain a young driver's license before age 18. We utilize licensing data from the Ohio Bureau of Motor Vehicles on over 35,000 applicants between 15.5 and 25 years old collected between 2017 and 2019. This dataset of driving schools is maintained by the Ohio Department of Public Safety and is linked with Census tract-level socioeconomic data from the U.S. Census. Using logit models, we estimate the completion of driver training and license obtainment among young drivers in the Columbus, Ohio metro area. We find that young drivers in lower-income Census tracts have a lower likelihood to complete driver training and get licensed before age 18. As travel time to driving schools increases, teens in wealthier Census tracts are more likely to forgo driver training and licensure than teens in lower-income Census tracts. For jurisdictions aspiring to improve safe driving for young drivers, our findings help shape recommendations on policies to enhance access to driver training and licensure especially among teens living in lower-income Census tracts.

Impulsivity and self-regulation: A dual-process model of risky driving in young drivers in Iran

The dual-process model of risky driving (Lazuras, Rowe, Poulter, Powell, & Ypsilanti, 2019) suggested that regulatory processes mediate the effect of impulsivity on risky driving. The current study aimed to examine the cross-cultural generalisability of this model to Iranian drivers, who are from a country with a markedly higher rate of traffic collisions. We sampled 458 Iranian drivers aged 18 to 25 using an online survey measuring impulsive processes including impulsivity, normlessness and sensation-seeking, and regulatory processes comprising emotion-regulation, trait self-regulation, driving self-regulation, executive functions, reflective functioning and attitudes toward driving. In addition, we used the Driver Behaviour Questionnaire to measure driving violations and errors. Executive functions and driving self-regulation mediated the effect of attention impulsivity on driving errors. Executive functions, reflective functioning, and driving self-regulation mediated the relationship between motor impulsivity and driving errors. Finally, attitudes toward driving safety significantly mediated the relationship of both normlessness and sensation-seeking with driving violations. These results support the mediatory role of cognitive and self-regulatory capacities in the connection between impulsive processes and driving errors and violations. Overall, the present study confirmed the validity of the dual-process model of risky driving in a sample of young drivers in Iran. Implications for educating drivers and implementing policies and interventions based on this model are discussed.

The drink and drug driving behaviours of young Queensland drivers and attitudes toward apprehension

OBJECTIVE

This study aimed to explore the self-reported drink and drug driving behaviors of a sample of young drivers from Queensland (Australia) holding a learner license (N = 162, 27%), provisional 1 (P1) license (N = 251, 41.8%), or provisional 2 (P2) license (N = 188, 31.3%), as well as motorists' corresponding perceptions about the likelihood of apprehension and their future intentions to offend.

METHODS

The study involved 601 drivers aged between 16 and 24 years (302 males, 50.2% and 296 females, 49.3%) who all completed an online survey.

RESULTS

Almost half the sample acknowledged engaging in drink and/or drug driving behaviors in the previous 12 months (N = 264, 44%), with a total of 773 drink driving and 8842 drug driving events reported. Offending was more common among P2 drivers (62% reported at least once), and least common among learner drivers (25% reported at least once). When predicting future drink driving and drug driving intentions, lower certainty of apprehension and greater past offending both emerged as significant predictors.

CONCLUSIONS

Young drivers may benefit from reminders throughout the GDL process regarding the laws and risks associated with impaired driving. Greater policing resources for drug and alcohol testing may be needed for young drivers, to establish a high certainty of apprehension, as early as possible in their driving experience.

Drive in the Moment: An evaluation of a web-based tool designed to reduce smartphone use among young drivers

OBJECTIVE

Young drivers are overrepresented in road traffic crashes and fatalities. Distracted driving, including use of a smartphone while driving (SWD), is a major risk factor for crashes for this age group. We evaluated a web-based tool (Drive in the Moment or DITM) designed to reduce SWD among young drivers.

METHODS

A pretest-posttest experimental design with a follow-up was used to assess the efficacy of the DITM intervention on SWD intentions and behaviors, and perceived risk (of having a crash and of being apprehended by the police) associated with SWD. One hundred and eighty young drivers (aged 17-25 years old) were randomly assigned to either the DITM intervention or a control group where participants completed an unrelated activity. Self-reported measures of SWD and perceptions of risk were obtained pre-intervention, immediately post-intervention and at a follow-up 25 days after the intervention.

RESULTS

Participants who engaged with the DITM showed a significant reduction in the number of times they used their SWD at follow-up compared to their pre-intervention scores. Future intentions to SWD were also reduced from pre-intervention to post-intervention and follow-up. There was also an increase in the perceived risk of SWD following the intervention.

CONCLUSIONS

Our evaluation of DITM suggests that the intervention had an impact on reducing SWD among young drivers. Further research is needed to establish which particular elements of the DITM are associated with reductions in SWD and whether similar findings would be identified in other age groups.

Normative influences on young drivers' illegal smartphone use: Applying an extended Theory of Normative Social Behaviour

In the 12 months to November 2021, 19 % of the people killed on Australian roads were aged between 17 and 25 years, despite this age group making up just 12 % of the driving population. A substantial number of these crashes resulted from smartphone use. It is widely accepted that norms influence young drivers' smartphone use; however, there is a dearth of research investigating how different norms interact to influence this behaviour. The current survey study (N = 137) applied an extended Theory of Normative Social Behaviour (TNSB) to investigate illegal smartphone use among young drivers. The original TNSB model proposes that injunctive norm (i.e., perceived societal approval), outcome expectancies, and group identity each moderate the relationship between descriptive norm and behavioural intention. The current study added subjective norm (i.e., perceived approval from important others) to the model. Moderation analyses found that only subjective norm moderated the relationship between descriptive norm and behavioural intention, whereas subjective norm, injunctive norm, and outcome expectancies each partially mediated this relationship. These findings provided partial support for the TNSB. They highlighted the influence of a range of norms on young drivers' smartphone use (i.e., descriptive norm, subjective norm, and injunctive norm) and, in particular, the influence of subjective norm in this context. It also highlights the importance of investigating how norms interact with each other to influence the relationship between descriptive norm and behavioural intention. In accordance with these findings, future public education messages should challenge normative influences, and subjective norm in particular, on young drivers' smartphone use.

Young drivers and smartphone use: The impact of legal and non-legal deterrents

INTRODUCTION

Young drivers continue to be overrepresented in road crash statistics and smartphone use has been identified as a dangerous form of driver distraction. Previous research has identified factors encouraging drivers to use their mobile phone, with few examining what deters drivers. This study examines the influence of legal and non-legal deterrents on smartphone use while driving (SWD) in a young adult sample.

METHOD

An online survey was administered to a sample of 524 Australian drivers aged 17-25 years. Measures included demographic variables, legal deterrents (certainty, severity, and swiftness), and non-legal deterrents: social loss (peers and parents), internal loss (anticipated regret) and physical loss (injury to self/others). Self-reported SWD was the outcome variable, measured separately for initiating SWD and responding SWD behaviors.

RESULTS

Responding behaviors were reported more frequently than initiating, and social, internal, and physical loss were perceived as higher for initiating versus responding behaviors. Anticipated action regret and physical loss were significant negative predictors of SWD across both modalities of communication. Anticipated inaction regret was also a significant positive predictor of initiating behaviors. Both legal deterrents and social loss were non-significant predictors for both modalities of SWD.

CONCLUSIONS

The results reinforce previous evidence showing that legal deterrence variables are not consistently effective at reducing offending behaviors. Future research should continue to explore the effect of non-legal deterrents across different modalities of SWD.

PRACTICAL APPLICATIONS

Road safety interventions aimed at young drivers should evaluate the impact of highlighting anticipated regret and potential injury to self and others associated with risky driving behaviors, such as SWD.

ADHD and dangerous driving in emerging adults: The moderating role of family climate for road safety

Dangerous driving accounts for 95% of driving fatalities among emerging adults. Emerging adult drivers exhibiting symptoms of Attention-Deficit/Hyperactivity Disorder (ADHD) are at greater risk for motor vehicle crashes and engaging in unsafe driving practices; however, not all individuals with ADHD symptoms exhibit such risk. Several studies have found that drivers' perceptions of their family's values and priorities related to driving practices predict driving outcomes among emerging adults; these factors have not been examined in the context of ADHD symptomology. We examined family climate for road safety as a moderator of ADHD symptoms and dangerous driving behaviors in a sample of college students. A total of 4,392 participants completed surveys measuring self-reported ADHD symptoms, dangerous driving behavior, and family climate for road safety. Results indicated that higher levels of parental feedback weakened the relation between ADHD symptoms and aggressive driving; higher levels of parental monitoring strengthened this relationship. Higher levels of parental monitoring strengthened the association between ADHD symptoms and negative emotion while driving. When participants perceived their parents as having high levels of noncommitment to road safety, the association between ADHD symptoms and self-reported risky driving increased. Higher levels of open communication about unsafe driving attenuated the relation between ADHD and risky driving. Overall, some but not all components of family climate for road safety appear to affect the relation between ADHD symptoms and dangerous driving in the expected direction.

Negative mood mind wandering and unsafe driving in young male drivers

OBJECTIVE

Road traffic crash fatalities disproportionately affect young male drivers. Driver distraction is a leading contributor to crashes. Mind wandering (MW) is a prevalent form of driver distraction that is linked to certain unsafe driving behaviours that are associated with increased crash risk (e.g., faster driving). Negative mood can lead to MW, and thus may represent a causal pathway to MW-related unsafe driving. This preliminary pre-post (T1, T2), randomized, controlled, single-blinded experiment tested whether negative mood, compared to neutral mood, increases MW while driving as well as unsafe driving and emotional arousal during MW. It also tested the moderating contribution of trait rumination and inhibitory control to this proposed causal pathway.

METHODS

Forty healthy male drivers aged 20 to 24 were randomly allocated to a negative or neutral mood manipulation involving deception. Individual differences in trait rumination and inhibitory control were measured at T1. At T1 and T2, participants drove in a driving simulator measuring driving speed, headway distance, steering behaviour, and overtaking. Heart rate and thought probes during simulation measured emotional arousal and MW, respectively.

RESULTS

Negative mood exposure led to more MW while driving (Odds Ratio = 1.79, p = .022). Trait rumination positively moderated the relationship between negative mood and MW (Odds Ratio = 2.11, p = .002). Negative versus neutral mood exposure led to increases in headway variability (Cohen's d = 1.46, p = .026) and steering reversals (Rate Ratio = 1.33, p = .032) during MW relative to focused driving. Between-group differences in emotional arousal were not significant.

CONCLUSION

Results support a causal pathway from negative mood to unsafe driving via MW, including the moderating contribution of trait rumination. If replicated, these preliminary findings may inform the development of interventions targeting this potential crash-risk pathway in vulnerable young driver subgroups.

Effectiveness of implementing a Graduated Driver Licensing (GDL) law among young Serbian drivers

INTRODUCTION

Young novice drivers have higher rates of engagement in road crashes worldwide, often owing to unfavorable attitudes toward road safety or lack of knowledge, experience, and risk consciousness. However, the implementation of graduated driver licensing (GDL) systems has proven effective in reducing the high incidence of young drivers involved in crashes.

METHOD

The purpose of this study was to compare the change in driving outcomes (e.g., attitudes toward traffic safety, behavior patterns while driving, risk assessment in traffic, assessment of personal driving skills, and involvement in traffic crashes) of young drivers prior to and following the implementation of a GDL law. Respondents (n = 642) completed a battery of questions, including a driver attitudes questionnaire (Behaviour of Young Novice Drivers Scale), a self-assessed driving ability questionnaire, and a risk perception questionnaire. Of the total sample size, 324 drivers passed the old system of training driver's license candidates, and 318 drivers passed the new GDL system.

RESULTS

The results showed that drivers licensed with GDL reported safer attitudes toward traffic rule violations and speed, and higher levels of safety orientation with regard to their driving abilities. They also reported much higher levels of risk perception and lower exposure to risky situations (risky driving exposure). There were no differences between GDL drivers and non-GDL drivers in terms of self-reported crashes or transient or fixed violations. In addition, GDL was not related to the number of traffic crashes, the number of fatalities, or serious and slight injuries in crashes involving young drivers in crashes obtained from official records.

CONCLUSIONS

The results suggest that GDL contributed to the improvement of drivers' attitudes and understanding of risk but did not contribute to significant changes in the behavior of young drivers and traffic crashes. In addition, the GDL program in Serbia only ranks fair on the Insurance Institute for Highway Safety (IIHS) scale. Strengthening the GDL program in Serbia with additional components in line with GDL programs rated as good by the IIHS scale could improve the safety of young and novice drivers in traffic.

The impact of descriptive and injunctive norms on engagement in mobile phone use while driving in young drivers: A systematic review

BACKGROUND/OBJECTIVES

Prior research indicates that younger adults overestimate their peers' engagement in risk-taking behaviours, with these estimates being directly associated with engagement in such behaviours. However, the extent to which younger adults perceive their peers' approval of, and engagement in, road traffic violations (such as mobile phone use while driving) is yet to be clearly identified. Further, the influence of such perceptions on subsequent mobile phone use while driving behaviours remains unclear. Accordingly, the aim of this systematic review was to (a) examine young drivers' perceptions regarding their peers' approval of (injunctive norms), and engagement in (descriptive norms) mobile phone use while driving and (b) to identify whether such perceptions increase young drivers own engagement in the behaviour.

METHODS

Studies were eligible for review if they measured (a) perceived social norms (descriptive/injunctive) and (b) the relationship between such norms and mobile phone use while driving in younger adults aged 16-25 years. Searches were conducted in December 2021, using Pubmed, Scopus, Web of Science, and TRID. Five articles were included in the review.

RESULTS

Overall, the results indicate that young drivers perceive their peers to engage in mobile phone use while driving on a frequent basis, however they typically believe that their peers disapprove of the behaviour. The majority of studies indicated that descriptive norms were significantly associated with increasing engagement in mobile phone use while driving (including distracted driving behaviours). Finally, the few studies that investigated injunctive norms on mobile phone use while driving indicated positive correlations between perceived peer approval and increasing distracted driving behaviour.

DISCUSSION

The findings highlight the importance of social norms in influencing behaviour, indicating that both descriptive and injunctive norms warrant further investigation when examining the impact of peer influences on mobile phone use while driving.

Peer pressure and risky driving: Development of a new scale

INTRODUCTION

Peer pressure is a main factor influencing risky driving behavior in young people. Most empirical studies have focused either on direct or indirect peer pressure, and comprehensive measures assessing both are currently lacking. The present study aimed at developing and validating a scale to examine the influence of different types of peer pressure on risky driving in young drivers: the Peer Pressure on Risky Driving Scale (PPRDS).

METHOD

Scale construction and assessment of its psychometric properties involved four phases: item development, assessment of content validity by expert reviewers, pre-testing of the scale and evaluation of psychometric properties of the final version in a sample of 773 young drivers aged 18-29.

RESULTS

Confirmatory factor analysis supported a three-factor structure that reflected the multifaceted definition of peer pressure on risky driving in the immediate driving context: risk-encouraging direct peer pressure; risk-discouraging direct peer pressure, and indirect pressure. The three factor scales showed good internal consistency and construct reliability, and correlated as expected with self-reported risky driving. Younger drivers (18-24) reported more direct and indirect peer pressure to engage in risky driving. Males indicated more direct peer pressure towards risky driving. Finally, interaction effects between age and sex were observed. Young male drivers reported the greatest direct peer pressure and adult female drivers the lowest direct peer pressure.

CONCLUSIONS

The 23-item PPRDS scale has good psychometric properties and provides a useful tool for assessing different forms of peer pressure on risky driving.

PRACTICAL APPLICATIONS

The PPRDS can be used for evaluating the impact of peer-based education and road safety programs. The scale also provides valuable information for the design of evidence-based intervention.

Unlicensed driving among young drivers in North Carolina: a quasi-induced exposure analysis

Background

Little is known about the prevalence of driving among teenagers who have not yet obtained a license. The primary objective of the present study was to estimate the prevalence of unlicensed driving among young drivers using the quasi-induced exposure (QIE) approach and to determine whether unlicensed driving was more common among minority and lower-income teenagers. Additionally, we examined whether unlicensed driving among adolescents increased following the implementation of a graduated driver licensing (GDL) system and whether GDL differentially affected minority and low-income adolescents.

Methods

Using North Carolina crash and driver license data, we identified 90,267 two-vehicle crashes from 1991 through 2016 where only one driver was considered contributory and the non-contributory driver was a White or Black 16 or 17 years old. In the QIE approach, these non-contributory young drivers are assumed to be representative of all adolescents driving in the state during this time period. The prevalence of unlicensed driving among adolescents by age and year was estimated by identifying the proportion of non-contributory drivers who had never been licensed by the time of their involvement in these two-vehicle crashes. We further conducted logistic regression analyses to examine the likelihood of a non-contributory young driver being unlicensed as a function of race, neighborhood income level, and licensing era (prior to or after GDL was implemented).

Results

During the 26 years for which data were available, the mean annual prevalence of unlicensed driving was 1.2% for 16-year-olds and 1.7% among 17-year-olds. Young Black drivers and individuals living in lower-income neighborhoods were somewhat more likely to drive before obtaining a license, but the rates of unlicensed driving among these groups were also quite low. Unlicensed driving increased slightly for 17-year-olds following the implementation of GDL, but returned to previous levels after a few years.

Conclusion

Unlicensed driving among adolescents in North Carolina is substantially less common than suggested by previous self-report studies and analyses of fatal crash data.

Sociodemographic characteristics of youth licensing at age 17 in the context of supervised driving in Denmark

INTRODUCTION

Allowing young drivers to gain experience while being supervised by an experienced driver is a widely used measure to try to reduce crash risk. On 1 January 2017, the Danish licensing system was updated to allow licensing at age 17 with post-license supervised driving until solo driving at age 18.

METHOD

Based on data from the Danish Driving License register and Statistics Denmark, including the entire population, the purpose of this study is to determine if sociodemographic characteristics and a history of violations and crash involvement among youth predict licensing at age 17. A second purpose is to estimate the time period from licensing until the driver turns 18 and to explore changes in license demand in the context of Denmark's updated licensing system.

RESULTS

An increasing proportion choose to license at the age of 17, but the proportion below 19 with a driver's license is unchanged. On average, the license is obtained 5.3 months before turning 18. Living in rural areas, with both parents, and in a family with several cars and higher income increases the likelihood of licensing at age 17. Young people with a history of involvement in non-traffic-related accidents or violations are more likely to license at age 17.

CONCLUSION

Lowering the license age to allow supervised driving increases early licensing. The average time period from licensing until the driver turns 18 is less than six months. Sociodemographic characteristics predict early licensing.

PRACTICAL IMPLICATIONS

Minimum requirements for the time period from licensing until the driver turns 18 are needed to support a safety benefit. Follow-up studies mapping supervised driving, crash involvement, and possible changes in crash risk associated with the change in the Danish licensing system are needed to specify the requirements.

Teen driver crashes potentially preventable by crash avoidance features and teen-driver-specific safety technologies

INTRODUCTION

Vehicle technologies have the potential to help address the disproportionate crash risk that teen drivers face. While crash avoidance features benefit the general population, several address crash scenarios for which teen drivers are particularly at risk, such as rear-end and lane-drift crashes. Other emerging technologies have been designed for teen drivers by addressing certain crash or injury risk factors associated with risky driving behavior, such as speeding or not wearing a seat belt.

METHODS

Using nationwide U.S. crash data from 2016 to 2019, this study examined the maximum potential safety benefits of three currently available crash avoidance features (front crash prevention, lane departure prevention, and blind spot monitoring) and three teen-driver-specific technologies (speeding prevention, extended seatbelt reminders and interlocks, and nighttime curfew violation alerts).

RESULTS

Teen-driver-specific features have the largest potential for reducing teen driver injuries and fatalities, followed by lane departure prevention, front crash prevention, and blind spot monitoring; however, altogether these technologies have the potential to prevent 78% of teen driver fatalities, 47% of injured teen drivers, and 41% of crashes involving teen drivers.

CONCLUSIONS

Crash avoidance features and teen-driver-specific vehicle technologies appear to address different risk factors and crash scenarios, which emphasizes the importance of utilizing both types of safety features to reduce the crash risk of teen drivers.

PRACTICAL APPLICATIONS

Wider acceptance, accessibility, and use of these technologies are needed for their safety potential to be realized. More manufacturers should offer and advertise teen-driver-specific technology suites that integrate crash avoidance systems and safety features that address risky driving behavior. While this study shows the maximum potential safety benefits of these technologies, further research is needed to understand the behavioral implications as teens learn to drive with these features.

It's not a hard and fast rule: A qualitative investigation into factors influencing speeding among young drivers

INTRODUCTION

Research demonstrates that young drivers exceed the posted speed limit more frequently than older drivers, and this demographic is also subsequently overrepresented in road crash statistics. This behavior remains a worldwide problem despite legal enforcement efforts that have proven to have limited efficiency and/or produce counterintuitive results.

METHOD

Consequently, this study undertook a qualitative analysis in order to understand the factors that are perceived to both prevent and promote speeding behavior among young drivers, guided by self-determination theory (SDT). Focus groups were conducted with a total of 60 young drivers aged 17-25 years. An inductive thematic analysis approach was taken to analyze the data.

RESULTS

Findings revealed the following factors influence the prevention of speeding: (1) legal consequences were perceived to deter low-level speeding, (2) fear of injury was believed to prevent high-level speeding, and (3) speed awareness monitors were considered to be an effective countermeasure. Meanwhile, factors perceived to contribute to violating speed restrictions included: (1) perceiving it is safe to do so, (2) a perceived norm to speed, (3) emotions, and (4) unintentional speeding. According to SDT, the factors that were perceived to prevent speeding promote externalized self-regulatory processes and are therefore limited by short-term behavior change.

PRACTICAL APPLICATIONS

The findings have important implications for designing countermeasures aimed at young drivers, not least illuminating the need to have education and media campaigns that target and build drivers' perceived competence, autonomy, and relatedness in relation to speeding in order to promote longer term compliance.

A proportional odds model of risk behaviors associated with recurrent road traffic crashes among young adults in Kuwait

Background

The aims of this cross-sectional study were to i) assess one-year period prevalence of one, two, three or more road traffic crashes (RTCs) as an ordinal outcome and ii) identify the drivers’ characteristics associated with this ordinal outcome among young adult drivers with propensity to recurrent RTCs in Kuwait.

Methods

During December 2016, 1465 students, 17 years old or older from 15 colleges of Kuwait University participated in this cross-sectional study. A self-administered questionnaire was used for data collection. One-year period prevalence (95% confidence interval (CI)) of one, two, three or more RTCs was computed. Multivariable proportional odds model was used to identify the drivers’ attributes associated with the ordinal outcome.

Results

One-year period prevalence (%) of one, two and three or more RTCs respectively was 23.1 (95% CI: 21.2, 25.6), 10.9 (95% CI: 9.4, 12.6), and 4.6 (95% CI: 3.6, 5.9). Participants were significantly (p < 0.05) more likely to be in higher RTCs count category than their current or lower RCTs count, if they habitually violated speed limit (adjusted proportional odds ratio (pOR_adjusted) = 1.40; 95% Cl: 1.13, 1.75), ran through red lights (pOR_adjusted = 1.64; 95%CI: 1.30, 2.06), frequently (≥ 3) received multiple (> 3) speeding tickets (pOR_adjusted = 1.63; 95% CI: 1.12, 2.38), frequently (> 10 times) violated no-parking zone during the past year (pOR_adjusted = 1.64; 95% CI: 1.06, 2.54) or being a patient with epilepsy (pOR_adjusted = 4.37; 95% CI: 1.63, 11.70).

Conclusion

High one-year period prevalence of one, two and three or more RTCs was recorded. Targeted education based on identified drivers’ attributes and stern enforcement of traffic laws may reduce the recurrent RTCs incidence in this and other similar populations in the region.

Smartphone use among young drivers: Applying an extended Theory of Planned Behaviour to predict young drivers' intention and engagement in concealed responding

Young drivers, aged 17-25 years, are more likely than other age groups to access social interactive technologies (e.g., Snapchat, Facebook) on their smartphones while driving. Many of these young drivers do so in a concealed manner, thereby diverting their eyes from the road for extended periods and increasing their crash risk. In accordance with previous research, an extended Theory of Planned Behaviour (TPB) was applied in this survey study to investigate psychosocial predictors of young drivers' intention, and behaviour, of responding to social interactive technology on a smartphone in a concealed manner. Participants (N = 154) resided in Australia, were aged 17-25 years, owned a provisional or an open licence, and owned a smartphone. Participants completed two online surveys administered 1-week apart. The first survey measured intention and assessed the TPB standard constructs of attitude, subjective norm, and perceived behavioural control, as well as the additional constructs of anticipated action regret, anticipated inaction regret, and problematic mobile phone usage. The first survey also assessed whether there were any differences in the salient beliefs (elicited in a previous study) about smartphone use between high and low intenders to engage in this behaviour. The second survey measured engagement in the behaviour of responding in a concealed manner in the previous week. Hierarchical multiple regression analyses showed the standard TPB accounted for 69% of variance in intention, and a further 4% was accounted for by the extended constructs. In the final model, all variables, except anticipated inaction regret, were significant predictors of intention. Intention was the only significant predictor of behaviour. A series of MANOVAs found significant differences in the salient belief items between high and low intenders (e.g., high intenders were more likely to believe that friends/peers and other drivers would approve of them engaging in this behaviour). These key findings can be used as focal points for public education messages to persuade young drivers to reduce the frequency of their smartphone use, which is vital to improve road safety for all users.

Psychological, psychophysiological and behavioural effects of participant-selected vs. researcher-selected music in simulated urban driving

We investigated the effect of participant-selected (PSel) and researcher-selected (RSel) music on urban driving behaviour in young men (N = 27; M_age = 20.6 years, SD = 1.9 years). A counterbalanced, within-subjects design was used with four simulated driving conditions: PSel fast-tempo music, PSel slow-tempo music, RSel music and an urban traffic-noise control. The between-subjects variable of personality (introverts vs. extroverts) was explored. The presence of PSel slow-tempo music and RSel music optimised affective valence and arousal for urban driving. NASA Task Load Index scores indicated that the urban traffic-noise control increased mental demand compared to PSel slow-tempo music. In the PSel slow-tempo condition, less use was made of the brake pedal. When compared to extroverts, introverts recorded lower mean speed and attracted lower risk ratings under PSel slow-tempo music. The utility of PSel slow-tempo and RSel music was demonstrated in terms of optimising affective state for simulated urban driving.

Learner drivers (and their parent-supervisors) benefit from an online hazard perception course incorporating evidence-based training strategies and extensive crash footage

We previously found that a six-session online hazard perception training course, which incorporates evidence-based learning strategies and footage of over a hundred real crashes, improved hazard perception skill and reduced risk-taking intentions in novice drivers who had passed their on-road driving test within the previous three years. However, one issue with targeting crash-prevention training at individuals who are already driving unsupervised is that drivers are at their highest crash risk immediately after they pass their on-road driving test. That is, the training may arrive too late to protect drivers while they are at their most vulnerable. It is also possible that it may prove difficult to persuade drivers to complete an unsupervised training course if they are already licensed to drive independently. Given that learner drivers cannot drive unsupervised, and that they are typically supervised by a parent, one potential strategy is to target the training at learners and to ask their parents to provide one-on-one mentoring throughout the course. We therefore recruited learner driver/parent-supervisor dyads to participate in a randomized control study, with the objective of examining the effects of the hazard perception training course on aspects of driving behaviour associated with crash risk (as measured using validated computer-based tests). Outcome measures included two hazard perception skill assessments (a response time hazard perception test and a verbal response hazard prediction test), and three tests assessing aspects of risk-taking propensity in driving (speed choice, following distance, and gap acceptance). Learners who completed the course (N = 26) significantly improved their scores on both hazard perception skill measures, and also chose safer following distances, compared with a waitlist control group (N = 23). However, the training did not significantly reduce learners' speed choice or gap acceptance propensity. The hazard perception skill of parent-supervisors, who observed the course but did not complete it, also improved on both hazard perception measures, relative to controls. Additionally, both learners and their parent-supervisors reported a range of positive effects on the learners' real-world driving performance. These results suggest that this type of hazard perception training could be beneficial if deployed during the learner phase of driver licensing.

Impact of L2 automated systems on hazard anticipation and mitigation behavior of young drivers with varying levels of Attention Deficit Hyperactivity Disorder symptomatology

Level 2 (L2) driving automation systems that maintain latitudinal and longitudinal control of the vehicle decrease mental workload and result in drivers failing to monitor and respond to potential roadway hazards. This issue is potentially important for young drivers with symptoms of Attention Deficit Hyperactivity Disorder (ADHD) since they have known difficulties anticipating and mitigating potential hazards on the road, a skill which requires attention. The objective of this study is to investigate how the use of partially automated (L2) systems and manual systems impacts hazard anticipation and mitigation among young drivers with varying levels of ADHD symptomatology. Sixty-eight drivers, classified into two groups - high and low ADHD symptomatology-navigated twice through three scenarios on a driving simulator, once with an L2 and once with a manual system. The results indicated that: (i) the hazard anticipation skills of drivers with both high and low ADHD symptomatology were depressed in the L2 condition relative to the manual condition; (ii) the hazard mitigations skills of drivers with both high and low ADHD symptomatology were depressed in the L2 condition relative to the manual condition on two measures, but improved on a third measure; and (iii) the hazard anticipation and mitigation skills of drivers with high and low ADHD symptomatology were differentially impacted, both within and across the two levels of automation. Taken together, the results indicate the pernicious and often hard to predict consequences of higher levels of automation for different populations of younger drivers.

Young drivers' determinants of driving under the influence of cannabis: Findings from the Youth Cannabis and Driving Survey (YouCanDS)

INTRODUCTION

Driving under the influence of cannabis (DUIC) is proven to increase the risk of collisions and is most common among young drivers (ages 16 to 24). However, little is known about the specific determinants of DUIC behavior among youth, which limits the capacity to develop evidence-based prevention and intervention efforts. This study developed and evaluated a youth DUIC questionnaire, which was used to establish the DUIC determinants of young drivers.

METHOD

The questionnaire was based on the theoretical framework of general deterrence and general prevention. Data obtained included: demographics, past cannabis use and DUIC experiences, DUIC intention, experiences riding as a passenger with someone DUIC, knowledge and credibility of the law, attitudes towards DUIC, and social controls. The resulting questionnaire was validated for a sample of 426 young drivers in the province of Ontario, Canada. An ordinal regression was conducted to examine the relationships between questionnaire items and DUIC intention.

RESULTS

The questionnaire displayed good construct validity and internal consistency across four out of five domains (KMO and Cronbach α values ≥ 0.70). Of the 426 respondents (52.6% female), 356 (83.6%) reported previous cannabis use, with 296 (69.5%) doing so in the past year, and 142 (33.3%) reporting DUIC. Furthermore, 179 (42%) study participants indicated at least a slight chance of DUIC in the next year. The regression analysis identified six variables predictive of DUIC intention: past DUIC incidence, perceived percent of those convicted that receive the penalty, moral awareness, perceived dangerousness, minor accident risk, and vicarious punishment avoidance.

CONCLUSIONS

Preventive efforts should emphasize these determinants when designing targeted strategies and interventions. Practical Applications: These efforts should focus on educating the dangers and risk of a vehicle collision, that law enforcement has the capacity to apprehend and appropriately punish individuals DUIC, and that DUIC is wrong and socially unacceptable.

The mere presence of a mobile phone: Does it influence driving performance?

The ubiquity of mobile phones has led to a rapid increase in its presence and use in vehicles, especially among young adults (up to 25 years), who are generally the least experienced group of drivers. The potential for phones to draw attention away from the main driving task has significant consequences for road safety. Previous studies have found that the mere presence of a mobile phone can be distracting by impairing attention in experimental non-driving contexts. However, the effect of phone presence, independent to usage, has not yet been examined in the context of driving. As such, the present study examined whether the mere presence of a mobile phone, its proximity to the driver, and power status (on/off) influenced the driving performance of young drivers. Additionally, this study assessed whether the effects of phone presence and proximity were moderated by an individual's level of dependence on, or emotional attachment to, their phone. A sample of 127 undergraduate psychology students (M = 19.76, SD = 1.63) were randomly assigned to one of four conditions: (1) phone absent (control), (2) phone on, in holder, (3) phone off, in holder, and (4) phone on, in pocket. They all completed the same simulated drive, and were measured for degree of phone dependence and phone emotional attachment. Overall, drivers in all the phone present conditions made significantly more driving errors (speeding and collision) compared to those in the phone absent (control) condition, irrespective of proximity to the phone and whether it was on or off. Phone dependence, but not phone emotional attachment, moderated the effect of phone presence on speeding behaviour. These findings suggest that the mere presence of a phone is distracting for drivers, especially so for those who are highly dependent on their phone, which may place them at a greater risk of a distraction induced crash.

"Like it's wrong, but it's not that wrong:" Exploring the normalization of risk-compensatory strategies among young drivers engaging in illegal smartphone use

INTRODUCTION

Young drivers are the most vulnerable road users and most likely to use a smartphone illegally while driving. Although when compared with drink-driving, attitudes to illegal smartphone risk are nearly identical, smartphone use among young drivers continues to increase.

METHOD

Four in-depth focus groups were conducted with 13 young (18-25 years) drivers to gain insight into their perceptions of the risks associated with the behavior. Our aim was to determine how drivers navigate that risk and if their behavior shapes and informs perceptions of norms.

RESULTS

Three key themes emerged: (a) participants perceived illegal smartphone use as commonplace, easy, and benign; (b) self-regulatory behaviors that compensate for risk are pervasive among illegal smartphone users; and (c) risk-compensation strategies rationalize risks and perceived norms, reducing the seriousness of transgression when compared with drink-driving. Young drivers rationalized their own use by comparing their selfregulatory smartphone and driving skills with those of "bad drivers," not law abiders. Practical Applications: These findings suggest that smartphone behaviors shape attitudes to risk, highlighting the importance for any countermeasure aimed at reducing illegal use to acknowledge how a young person's continued engagement in illegal smartphone use is justified by the dynamic composition of use, risk assessment and the perceived norms.

A unified deterrence-based model of legal and non-legal factors that influence young driver speeding behaviour

Young driver speeding behaviour remains a large contributor to road trauma worldwide. In order to provide a more-in depth understanding of how to deter young drivers from this behaviour, this study developed and tested a model of the legal and non-legal factors that influence young driver's intentional speeding behaviour (exceeding the speed limit by more than 10 km/hr). A prospective survey design was conducted to measure the impact of perceptions of legal factors (including classical deterrence and reconceptualised deterrence variables) and non-legal factors (including the variables of fear of physical loss, material loss and perceived social sanctions, as well as the perception that it is safe to engage in the behaviour without being involved in a crash) at time 1, on engagement in speeding behaviour at time 2, which occurred 3 months later. A total of 200 participants aged 17-25 years completed both surveys (Mean age = 20.44 years). Using structural equation modelling, a unique model combining classical and extended deterrence theory, as well as prominent non-legal factors was created, and the variables were able to explain 41% of the variance in speeding behaviour. A high perceived severity of the punishment, experiencing direct punishment avoidance and perceiving that it is safe to speed were significant direct predictors. Meanwhile, there were also numerous significant partially mediated relationships found for both legal and non-legal variables. These findings provide important implications for both the application of deterrence-based theories in road safety and for improving countermeasures to deter young drivers more effectively from engagement in speeding.

A driving simulation study on the effects of different wine types on the performance of young drivers

BACKGROUND

Alcohol consumption is responsible for a significant number of road fatalities. To contrast this phenomenon, a more responsible attitude to the wine consumption, especially among young, inexperienced drivers prone to risky behaviour on the road must be promoted.

METHOD

This is a simplified single-blind, placebo-controlled experiment aimed at evaluating 44 young drivers monitored during a driving simulation following the consumption of natural and conventional wines, with a reference blood alcohol concentration (BAC) of 0.5 g/l. Two hypotheses are tested: (1) the legal consumption of wine has no significant impact on young drivers' performance in both ordinary and unusual road events; (2) natural and conventional wines are expected to produce negligible and acceptable impairments in young drivers the same BAC. Two reference groups (BAC = 0 g/l), one a placebo-controlled group with drivers treated with a dealcoholized wine, were included.

RESULTS AND CONCLUSIONS

Significant differences between the groups in terms of perception and reaction times (PRT) to visual and auditory stimuli, and to speeding were observed, with young drivers treated with conventional wine displaying more aggressive behaviours. In contrast, participants treated with natural wine showed PRT which were not significantly different from those belonging to control groups. The gaze attention levels of wine treated drivers were found to be dose dependant, with young drivers of the two control groups and those of the treated ones with BAC < 0.3 g/l able to focus on wider area ahead and, thereby, collect more information from the road environment.

Modelling brake transition time of young alcohol-impaired drivers using hazard-based duration models

Braking performance of drivers is a crucial factor in evaluating the collision patterns and implementing road safety measures. Further, alcohol is known to impair driving control. The present study aims to examine the influence of a comprehensive range of Blood Alcohol Concentration (BAC) levels (0%, 0.03 %, 0.05 % and 0.08 %) on brake transition times of drivers. As young drivers show significantly higher crash risks compared to the experienced drivers, fifty-four young Indian drivers in the age group of 21-25 years (forty males and fourteen females) participated in the driving simulator experiments. The study adopted the framework of a within-subjects design, where each driver encountered rural and urban driving scenarios in a counterbalanced order, during experimental driving at each of the four BAC levels. Their brake transition times were estimated with respect to sudden pedestrian crossing events. Weibull Accelerated Failure Time (AFT) models with shared frailty were developed for quantifying the effects of BAC levels along with driver attributes on brake transition time. Preliminary analysis showed significant main effects of BAC (p < 0.001) and driving environment (p = 0.002) on brake transition time; however, their interaction effect was not significant (p = 0.485). The models revealed that 0.03 %, 0.05 % and 0.08 % BACs significantly reduced the brake transition times by 16 %, 28 % and 52 % in rural driving environment, and by 23 %, 37 % and 53 % in urban driving environment, compared to 0% BAC. The study outcomes may find application in assisting collision warning systems which take into account the braking behaviour of drivers.

Understanding the predictors of young drivers' speeding intention and behaviour in a three-month longitudinal study

This study aimed to examine to what extent an Adolescent Speeding Specific Model (ASSM), extending the theory of planned behaviour (TPB), predicts young drivers' (aged 18-25) future and past speeding (n = 126). The ASSM tested the contribution of demographics, split TPB, additional predictors and past behaviour to young drivers' speeding at two moments of time, over three months. Hierarchical multiple regression revealed that participants most likely to speed in the future were those who have done so in the past (independent predictor (ip): past compliance with the speed limit), and who were not certain in their ability to control their speeding (ip: self-efficacy). ASSM also indicated that people who reported speeding at T1 did so at T2 as well (ip: past compliance with the speed limit). The results also show that sensitive to rewards people would speed more (ip: sensitivity to reward), similar to ones with less control over their behaviour (ip: perceived controllability) or with more driving experience (ip: GDL phase). Overall, the ASSM explained 73% of the intention to comply with speed limits variation and 62% of the present compliance with the speed limit variation. Compared to models, similar in structure to ASSM, our model explained variance in intention, equal to the previously maximum observed, and 22% more variance in behaviour. As a result, our findings may help design better targeted educational campaigns to prevent young drivers' speeding.

At what stages of licensing do graduated driver licensing systems reduce crashes? Example from Queensland, Australia

Evaluations of new graduated licensing systems (GLS) commonly examine pre-post young driver crash rates relative to another driver group. This comparison approach is important to account for other influences on crashes over time, but has limited ability to determine which GLS components are most effective and at what stage during the licensing process. We previously identified declines in young driver crashes in Queensland, Australia, following introduction of a new GLS in 2007. The objective of the current research was to conduct complementary modelling to identify at what points through the licensing process had particular GLS policies contributed to reductions. Crash trends were explored for learner and provisional drivers under the new GLS versus previous system for three time periods relative to the month of acquiring a provisional licence: the preceding learner period, the first month of provisional licensure (when crashes typically peak), and the overall provisional period. Interrupted time series analyses were conducted for the log ratio of crashes per 10,000 licensed (learner and provisional) drivers with the total number of licensed drivers as an offset. The greatest declines were found in the first month of licensure, with indications that a longer learner period, higher supervised driving hours, and a new provisional night-passenger restriction were key contributors to provisional crash reductions. There was also some indication that a restriction on all phone use reduced crashes during the learner period. We conclude that time series analysis focusing on licensing stage, rather than calendar time only, offers a complementary approach to analysing GLS effectiveness by better identifying where and how changes impact crashes.

Alcohol- and speeding-related fatal crashes among novice drivers age 18-20 not fully licensed at the time of the crash

INTRODUCTION

Some teens may intentionally delay their driving licensure until age 18 or later, thereby skipping the learning and driver safety benefits provided by graduated driver licensing (GDL) programs. Delaying driving initiation could elevate teen crash risk once they begin driving. This study compares the prevalence of alcohol use and speeding among individuals aged 18-20 y/o who were not fully licensed drivers (NFLD) at the time of the fatal crash with that of their fully licensed counterparts (FLD).

MATERIALS AND METHODS

Data came from the 2010-2017 Fatality Analysis Reporting System (FARS). Census data were added to measure mean household income at drivers' zip code. Bivariate (chi-square) and logistic regressions were used to assess the likelihood young drivers were alcohol-positive and/or speeding at the time of the crash as a function of drivers' license status, demographic, socioeconomic, and the strength of GDL programs in the state.

RESULTS

Compared with females and White drivers age 18-20 y/o, males, Latino, and Black drivers were more likely to be NFLD at the time of the fatal crash (p < .0001). Living in zip codes with low median household income (p < .001) and the strength of GDL restrictions (p < .0001) were associated with individuals being NFLD at the time of the fatal crash. Alcohol-related fatal crashes were more prevalent among NFLD than FLD (p < .02).

CONCLUSIONS

The study provides indirect evidence suggesting that alcohol use may be more detrimental for NFLD than for FLD.

Factors Contributing to Delay in Driving Licensure Among U.S. High School Students and Young Adults

PURPOSE

More teens delay in driving licensure (DDL). It is conceivable they miss Graduated Driver Licensing (GDL) safety benefits. We assessed prevalence, disparities, and factors associated with DDL among emerging adults.

METHODS

Data used were from all seven waves (W1-7) of the NEXT Generation Health Study (W1 in 10th grade [2009-2010]). The outcome variable was DDL (long-DDL [delayed >2 years], intermediate-DDL [delayed 1-2 years] versus no-DDL), defined as participants receiving driver licensure ≥1 year after initial eligibility. Independent variables included sex, urbanicity, race/ethnicity, family structure, parental education, family affluence, parental monitoring knowledge, parent perceived importance of alcohol nonuse, and social media use. Logistic regressions were conducted.

RESULTS

Of 2,525 participants eligible for licensure, 887 (38.9%) reported intermediate-DDL and 1,078 (30.1%) long-DDL. Latinos (adjusted odds ratio [AOR] = 2.5 vs. whites) and those with lower affluence (AOR = 2.5 vs. high) had higher odds of intermediate-DDL. Latinos (AOR = 4.5 vs. whites), blacks (AOR = 2.3 vs. whites), those with single parent (AOR = 1.7 vs. both biological parents), whose parents' education was high school or less (AOR = 3.7 vs. bachelor+) and some college (AOR = 2.0 vs. bachelor+) levels, and those with lower affluence (AOR = 4.4 vs. high) had higher odds of long-DDL. Higher mother's monitoring knowledge (AOR = .6) was associated with lower odds of long-DDL, but not intermediate-DDL.

CONCLUSIONS

Some teens that DDL "age out" of protections afforded to them by GDL driver restrictions. Minority race/ethnicity, socioeconomic status, urbanicity, and parenting factors contribute to DDL. Further study of these factors and their individual/collective contributions to DDL is needed to understand potential unintended consequences of GDL, particularly in more vulnerable youth.

Differences between males and females in the prediction of smartphone use while driving: Mindfulness and income

INTRODUCTION

This study examines the relationship between two variables-mindfulness and income-with regards to their relationship to the use of smartphones by young drivers, which has been known to increase the likelihood of car accidents, endangering young drivers and other road users. The study focuses on the relationship between these variables and the use of smartphones while driving, and how this relationship differs between males and females.

METHOD

The study sample included 221 young drivers who were legally permitted to drive without supervision. The subjects were first asked to complete questionnaires on mindfulness and income. Next, their smartphone use while driving was monitored over a one-month period. This study is unique as it used an objective smartphone monitoring application (rather than self-reporting) to count the number of times the young participants actually touched their smartphones while driving.

RESULTS

The findings show that the effects of social and personal factors (i.e., income and mindfulness) on the use of smartphones while driving are significant for males but not for females.

CONCLUSIONS

Most studies that investigate differences between males and females with respect to safety focus on differences in the averages of safety-related variables (such as safety performance and outcomes). In the current study, however, we identified differences in relationships between variables and demonstrated that what predicts safety-related behavior in males may not be a good predictor for females.

PRACTICAL APPLICATIONS

Mindfulness and income can be used to identify male populations that are at risk of using smartphones while driving. Interventions that improve mindfulness can be used to reduce the use of smartphones by male drivers.

The contribution of driving with friends to young drivers' intention to take risks: An expansion of the theory of planned behavior

Young drivers' reckless driving, especially among males, is a global phenomenon and a major cause of injury and death. The behavior of young people, including their driving norms, is influenced by the dominant social discourse in their age group. Thus, the nature of the interaction between young drivers and their peers may contribute to increased or decreased risk exposure not only for everyone in the car, but also for other road users, and therefore warrants deeper examination. This study aims to shed light on driving with friends as a particular case of driving with peers. It was designed to examine the role of the four dimensions of the Safe Driving Climate among Friends (SDCaF) scale, in predicting young drivers' intention to take risks behind the wheel, beyond the contribution of the Theory of Planned Behavior (TPB). The sample consisted of 166 participants (70 men, 96 women), ranging in age from 17 to 24 years, who completed a set of self-report questionnaires. The findings demonstrate that the SDCaF dimensions, and especially perceived friends' pressure while driving, add to the explained variance in intention to engage in risky driving, beyond the variance explained by gender and the three components of the TPB. In addition to its theoretical expansion of the TPB model to include specific components relating to perceived driving with friends, the study's practical significance lies in directing efforts towards revealing pathways to reduce reckless driving among young people, through engaging their friends in the process.

Impacts of graduated driver licensing regulations

We evaluate the impact of the Graduated Driver Licensing (GDL) system introduced in Victoria, Australia as they influence both injury and fatality rates. Since 1990, the Victorian GDL scheme has undergone several modifications including the introduction of new requirements and the stricter enforcement of existing regulations. Our evaluation of the GDL is based on monthly mortality and morbidity data for drivers 18-25 for the period January 2000 to June 2017. We estimate the immediate and long-term impacts of each policy change to the GDL system. Our results indicate that several initiatives in the GDL system have had impacts on both fatalities and injuries requiring hospitalisation when differentiated by gender. In a number of cases we observe that reactions to these measures are common to both genders. These include: the signalling of the proposed GDL changes in the media, the introduction of an extra probationary year for those under 21, the total alcohol ban for the entire probationary period, and limits on peer passengers for the first year. Stricter mobile phone restrictions appear to have had no impact on injuries for either males or females although they were associated with lower fatality rates for both. In addition, we found an indication that in the period prior to the introduction of the mandatory requirement of 120 h supervised driving, there was a rise in male driver injuries possibly caused by a rush of more inexperienced learners to obtain their probationary licence.

Predicting the monitoring/reading of communications on a smartphone among young drivers using an extended theory of planned behaviour

Australian drivers aged 17-25 years are overrepresented in road crashes, with many crashes resulting from smartphone use. The current study, based on a prospective design and an extended TPB framework, predicted young drivers' intentions to, and actual behaviour of, monitoring/reading social interactive technology via a smartphone while driving. An online survey at Time 1 (N = 167) assessed the TPB constructs of attitude, subjective norm and perceived behaviour control (PBC), and the additional factors of habit, mindfulness and cognitive capture. A hierarchical multiple regression analysis showed that the TPB constructs accounted for 76.4% in the variance of young drivers' intentions. The extended model, which included habit, mindfulness and cognitive capture accounted for a significant 79% of the variance in intention, and these additional factors explained a significant amount of variance over and above the TPB constructs. The Time 2 survey (N = 95) assessed actual behaviour in relation to smartphone use in the one-week period between the Time 1 and 2 surveys. Results from a multiple regression analysis of Time 2 found that, as expected, intention was a significant predictor of the behaviour of monitoring/reading a smartphone while driving. The results support the TPB for predicting intention and actual behaviour in relation to monitoring/reading a smartphone while driving. The theoretical and practical implications of the current study are discussed as well as recommendations for future research.

The influence of the revised reinforcement sensitivity theory on risk perception and intentions to speed in young male and female drivers

This study applied the revised-Reinforcement Sensitivity Theory (r-RST) to assess the influence of individual differences in young male and female drivers' risk perceptions and intentions to exceed the posted speed limit in a 60 km/hr zone. Relevant to the current study was the Behavioural Activation System (BAS; sensitive to reward), with a specific focus on the BAS processes: Reward Interest, Goal-Drive Persistence, Reward Reactivity and Impulsivity, and the Fight-Flight-Freeze System (FFFS; sensitive to punishment). It was hypothesised that young male and female drivers with stronger BAS traits would report lower risk perceptions towards speeding behaviour than those with weaker BAS traits and this risk perception would predict greater intentions to exceed the posted speed limit in 60 km/hr zones. It was further hypothesised that young male and female drivers with stronger FFFS traits would report higher risk perceptions towards speeding behaviour than those with weaker FFFS traits and this risk perception would predict lower intentions to exceed the posted speed limit in 60 km/h zones. Participants were 367 young licensed Australian drivers aged between 17 and 25 years. The results of a mediation analyses showed that females with stronger Impulsivity had low perceptions of risk and higher intentions to speed than participants with weaker Impulsivity. Further, males with stronger Goal-Drive Persistence and reported higher perceptions of risk and lower intentions to speed than participants with weaker Goal-Drive Persistence. Contrary to expectations, the BAS processes of Reward Interest and Reward Reactivity, and the FFFS were not significant. The findings contribute to the theoretical understanding of how the r-RST traits, specifically Goal-Drive Persistence and Impulsivity may influence speeding behaviour as well as the understanding of the unique influence of the four underlying BAS processes.

Driving distracted with friends: Effect of passengers and driver distraction on young drivers' behavior

Both passengers and driver distraction can have negative effects on young driver behavior. However, it is not known how these two concepts interact to influence driver behavior. The objective of this study was to examine the effect of passenger presence and driver distraction on young drivers' behavior. Forty-eight participants aged 18-20 participated in a driving simulator study. Participants completed three distracting tasks (visual, cognitive, or combined) while navigating a highway scenario. Results indicated that passenger presence interacted with driver distraction to have an effect on elevated g-force events in curves. Separately, distraction affected driving performance differently according to whether the task was visual, cognitive or combined. Having a close friendship resulted in less speeding and male drivers tended to maintain a better lane position compared to females. The results have implications for licensing laws as well as intervention programs aimed at improving young driver behavior.

Young driver fatal motorcycle accident analysis by jointly maximizing accuracy and information

While young drivers (YDs) constitute ∼10% of the driver population, their fatality rate in motorcycle accidents is up to three times higher. Thus, we are interested in predicting fatal motorcycle accidents (FMAs), and in identifying their key factors and possible causes. Accurate prediction of YD FMAs from data by risk minimization using the 0/1 loss function (i.e., the ordinary classification accuracy) cannot be guaranteed because these accidents are only ∼1% of all YD motorcycle accidents, and classifiers tend to focus on the majority class of minor accidents at the expense of the minority class of fatal ones. Also, classifiers are usually uninformative (providing no information about the distribution of misclassifications), insensitive to error severity (making no distinction between misclassification of fatal accidents as severe or minor), and limited in identifying key factors. We propose to use an information measure (IM) that jointly maximizes accuracy and information and is sensitive to the error distribution and severity. Using a database of ∼3600 motorcycle accidents, a Bayesian network classifier optimized by IM predicted FMAs better than classifiers maximizing accuracy or other predictive or information measures, and identified fatal accident key factors and causal relations.

The impact of changes to the NSW graduated driver licensing system on subsequent crash and offense experience

INTRODUCTION

In mid-2007 the State of New South Wales (NSW) in Australia introduced modifications to the existing graduated driver licensing system, lengthening the mandatory number of supervised hours for learner drivers aged under 25 years from 50 to 120 and extending the minimum learner period from 6 to 12 months. Additional driving restrictions were also introduced for young drivers in the two provisional licensed periods, P1, P2. This paper aims to evaluate this change by comparing the crash and offense experiences of young learner drivers before and after it occurred.

METHOD

From driver licensing files supplied by the NSW transport authority two cohorts of persons obtaining their initial learner's permits in the year prior to the changes and in the subsequent year were constructed with demographic data, dates of transition to the driving phases, dates of crashes, and dates and types of traffic offenses. Both cohorts comprised around 100,000 individuals. Crash rates per 100 years of person-time under observation post P1 with their standard errors were calculated. Using a survival-analytic approach the proportion of crashes of all types were graphed in three month periods post P1. Sexes were treated separately as were initial learner ages of 16, 17, 18-21, and 22-24 years. The distribution of traffic offense types during P1 and P2 phases were also compared. With such large numbers formal statistical testing was avoided.

RESULTS

No meaningful differences in the crash or offense experiences of the two cohorts in either sex or at any age were observed. Delaying progress to unsupervised driving has road safety benefits.

CONCLUSIONS

At least in conditions similar to those in NSW, requiring more than 50 h of supervised driving seems to have few road safety benefits. Practical applications: Licensing authorities should be cautious in extending the mandated number of supervised driving hours beyond 50.

Exploring the impact of "soft blocking" on smartphone usage of young drivers

Smartphone usage while driving, and particularly texting, are well recognized as a major road safety concern. This paper presents an attempt to evaluate the effect of countermeasures aimed at mitigating this usage. These countermeasures, which are automatically activated, may be considered "soft blockers": silencing and hiding notifications, as well as sending an automatic reply to the person trying to contact the driver. A naturalistic study was conducted with 167 young Israeli drivers, who installed a research-oriented smartphone app, which continuously monitored their smartphones usage while driving and, in addition, activated "soft blocking" in the study's intervention stage. The evaluation is based on measures which capture the number of times drivers "touch" their smartphone screens, and on the vehicle's speed when these screen-touches occur. The results, based on 6633 hours of driving logged on 23,019 trips, indicate that a reduction of approximately 20% was obtained in the average number of screen-touches during the intervention stage of the study; that is, in the experimental groups but also in the control group, which was merely monitored. In addition, when young drivers touched the screen, the vehicle was more likely not in motion. The current paper highlights the potential of "soft blockers", as well as the awareness of being monitored, for mitigating smartphone usage while driving.

Alcohol and marijuana use among young injured drivers in Arizona, 2008-2014

OBJECTIVE

We examined alcohol and marijuana use among injured drivers aged 16-20 years evaluated at Arizona level 1 trauma centers during 2008-2014.

METHODS

Using data from the Arizona State Trauma Registry, we conducted a descriptive analysis of blood alcohol concentration (BAC) and qualitative test results (positive or negative) for delta-9-tetrahydrocannabinol (THC) by year of age, sex, race, ethnicity, injury severity, seat belt use, motorcycle helmet use, and type of vehicle driven. To explore compliance with Arizona's motorcycle helmet law requiring helmet use for riders <18 years old, we examined helmet use by age.

RESULTS

Data on 5,069 injured young drivers were analyzed; the annual number of injured drivers declined by 41% during the 7-year study period. Among the 76% (n = 3,849) of drivers with BAC results, 19% tested positive, indicating that at least 15% of all drivers had positive BACs. Eighty-two percent of the BAC-positive drivers had BACs ≥0.08 g/dL, the illegal threshold for drivers aged ≥21 years. Among the 49% (n = 2,476) of drivers with THC results, 30% tested positive, indicating that at least 14% of all drivers were THC-positive. American Indians and blacks had the highest proportion of THC-tested drivers with positive THC results (38%). In addition, 28% of tested American Indians had positive results for both substances, more than twice the proportion seen in all other race or ethnic groups. Crude prevalence ratios suggested that drivers who tested positive for alcohol or THC were less likely than those who tested negative to wear a helmet or seat belt, further increasing their injury risk. Helmet use among motorcyclists was lower among 16- and 17-year-old riders compared to 18- to 20-year-olds, despite Arizona's motorcycle helmet law requiring riders aged <18 years to wear a helmet.

CONCLUSIONS

About 1 in 4 injured drivers aged 16-20 years tested positive for alcohol, THC, or both substances. Most drivers with positive BACs were legally intoxicated (BAC ≥0.08 g/dL). All substance-using young drivers in this study were candidates for substance abuse screening and possible referral to treatment. Broader enforcement of existing laws targeting underage access to alcohol and alcohol-impaired driving could further reduce injuries among young Arizona drivers. To further reduce crash-related injuries and fatalities among all road users, the state could consider implementing a primary enforcement seat belt law and a universal motorcycle helmet law.

The effects of training impulse control on simulated driving

There is growing interest in young driver training that addresses age-related factors, including incompletely developed impulse control. Two studies investigated whether training of response inhibition can reduce risky simulated driving in young drivers (aged 16-24 years). Each study manipulated aspects of response inhibition training then assessed transfer of training using simulated driving measures including speeding, risky passing, and compliance with traffic controls. Study 1 (n = 65) used a Go/No-go task, Stop Signal Task and a Collision Detection Task. Designed to promote engagement, learning, and transfer, training tasks were driving-relevant and adaptive (i.e. difficulty increased as performance improved), included performance feedback, and were distributed over five days. Control participants completed matching "filler" tasks. Performance on trained tasks improved with training, but there was no significant improvement in simulated driving. Study 2 enhanced response inhibition training using Go/No-go and SST tasks, with clearer performance feedback, and 10 days of training. Control participants completed testing only, in order to avoid any possibility of training response inhibition in the filler tasks. Again performance on trained tasks improved, but there was no evidence of transfer of training to simulated driving. These findings suggest that although training of sufficient interest and duration can improve response inhibition task performance, a training schedule that is likely to be acceptable to the public does not result in improvements in simulated driving. Further research is needed to investigate whether response inhibition training can improve risky driving in the context of real-world motivations for risky driving.

Understanding the psychological precursors of young drivers' willingness to speed and text while driving

This study applied the Prototype Willingness Model (PWM) to investigate the factors that may predict young drivers' (non-intentional) willingness to text while driving, text while stopped, and engage in high and low levels of speeding. In addition, the study sought to assess whether general optimism bias would predict young drivers' willingness to text and speed over and above the PWM. Licenced drivers (N = 183) aged 17-25 years (M = 19.84, SD = 2.30) in Queensland, Australia completed an online survey. Hierarchical multiple regressions revealed that the PWM was effective in explaining the variance in willingness to perform all four illegal driving behaviours. Particularly, young drivers who possessed favourable attitudes and a positive prototype perception towards these behaviours were more willing to engage in texting and speeding. In contrast to the study's predictions, optimistically biased beliefs decreased young drivers' willingness to text while stopped and engage in high and low levels of speeding. The findings of the study may help inform policy and educational campaigns to better target risky driving behaviours by considering the influence of attitudes, prototypes and the non-intentional pathway that may lead to engagement in texting while driving and stopped and engagement in high and low levels of speeding.

Effectiveness of visual warnings on young drivers hazard anticipation and hazard mitigation abilities

Previous studies have demonstrated that young drivers fail both to scan for and mitigate latent hazards mostly due to their cluelessness. This study aims to investigate whether these skills could be improved by providing young drivers with alerts in advance of the upcoming threat using a driving simulator experiment. In particular, the warning was presented on the head-up displays (HUD) either 2 s, 3 s or 4 s in advance of a latent threat. The hazard anticipation, hazard mitigation and attention maintenance performance of forty-eight young drivers aged 18-25 was evaluated across eight unique scenarios either in the presence or in the absence of latent threat alerts displayed on a HUD. There were four groups overall: one control group (no alert) and three experimental groups (2 s alert, 3 s alert and 4 s alert). The analysis of the hazard anticipation data showed that all three experimental groups with HUD warnings (2 s, 3 s, 4 s) significantly increased the likelihood that drivers would glance towards latent pedestrian and vehicle hazards when compared to the control group. The hazard mitigation analysis showed that in situations involving a pedestrian threat, HUD alerts provided 3 or 4 s in advance of a potential threat led drivers to travel significantly slower than the control group or the 2 s group. No significant effect of a HUD alert on drivers' speed was found when the latent hazard was a vehicle. An analysis of eye behaviors showed that only 7 out of 597 glances at the HUD were longer than 2 s safety-threshold, indicating that the warnings do not seem to distract the driver.