Licensing age issues: deliberations from a workshop devoted to this topic.

OBJECTIVE: To highlight the issues and discuss the research evidence regarding safety, mobility, and other consequences of different licensing ages. METHODS: Information included is based on presentations and discussions at a 1-day workshop on licensing age issues and a review and synthesis of the international literature. RESULTS: The literature indicates that higher licensing ages are associated with safety benefits. There is an associated mobility loss, more likely to be an issue in rural states. Legislative attempts to raise the minimum age for independent driving in the United States--for example, from 16 to 17--have been resisted, although in some states the age has been raised indirectly through graduated driver licensing (GDL) policies. CONCLUSIONS: Jurisdictions can achieve reductions in teenage crashes by raising the licensing age. This can be done directly or indirectly by strengthening GDL systems, in particular extending the minimum length of the learner period. Supplementary materials are available for this article. Go to the publisher's online edition of Traffic Injury Prevention for the following supplemental resource: List of workshop participants.

Trends in alcohol-impaired driving in Canada.

While a general decreasing trend in the number of persons killed in a traffic crash involving a drinking driver has occurred in Canada since the 1980s, it is evident that much of this decrease occurred in the 1990s. Since 2002, less progress has been made as the number of persons killed in crashes involving drinking drivers remains high. To better understand the current situation, this paper describes trends in drinking and driving in Canada from 1998 to 2011 using multiple indicators based on data collected for the Traffic Injury Research Foundation's (TIRF) Road Safety Monitor (RSM), the National Opinion Poll on Drinking and Driving, and trends in alcohol-related crashes based on data collected for TIRF's national Fatality Database in Canada. There has been a continued and consistent decrease in the number of fatalities involving a drinking driver in Canada. This remains true when looking at the number of fatalities involving a drinking driver per 100,000 population and per 100,000 licensed drivers. This decreasing trend is also still apparent when considering the percentage of persons killed in a traffic crash in Canada involving a drinking driver although less pronounced. Data from the RSM further show that the percentage of those who reported driving after they thought they were over the legal limit has also declined. However, regardless of the apparent decreasing trend in drinking driving fatalities and behaviour, reductions have been relatively modest, and fatalities in crashes involving drivers who have consumed alcohol remain high at unacceptable levels.

Using Crash Data to Develop Simulator Scenarios for Assessing Novice Driver Performance.

Teenage drivers are at their highest crash risk in their first 6 months or first 1,000 mi of driving. Driver training, adult-supervised practice driving, and other interventions are aimed at improving driving performance in novice drivers. Previous driver training programs have enumerated thousands of scenarios, with each scenario requiring one or more skills. Although there is general agreement about the broad set of skills needed to become a competent driver, there is no consensus set of scenarios and skills to assess whether novice drivers are likely to crash or to assess the effects of novice driver training programs on the likelihood of a crash. The authors propose that a much narrower, common set of scenarios can be used to focus on the high-risk crashes of young drivers. Until recently, it was not possible to identify the detailed set of scenarios that were specific to high-risk crashes. However, an integration of police crash reports from previous research, a number of critical simulator studies, and a nationally representative database of serious teen crashes (the National Motor Vehicle Crash Causation Survey) now make identification of these scenarios possible. In this paper, the authors propose this novel approach and discuss how to create a common set of simulated scenarios and skills to assess novice driver performance and the effects of training and interventions as they relate to high-risk crashes.

On-road and simulated driving: concurrent and discriminant validation.

INTRODUCTION: A converging pair of studies investigated the validity of a simulator for measuring driving performance/skill. STUDY 1: A concurrent validity study compared novice driver performance during an on-road driving test with their performance on a comparable simulated driving test. RESULTS: Results showed a reasonable degree of concordance in terms of the distribution of driving errors on-road and errors on the simulator. Moreover, there was a significant relationship between the two when driver performance was rank ordered according to errors, further establishing the relative validity of the simulator. However, specific driving errors on the two tasks were not closely related suggesting that absolute validity could not be established and that overall performance is needed to establish the level of skill. STUDY 2: A discriminant validity study compared driving performance on the simulator across three groups of drivers who differ in their level of experience--a group of true beginners who had no driving experience, a group of novice drivers who had completed driver education and had a learner's permit, and a group of fully licensed, experienced drivers. RESULTS: The findings showed significant differences among the groups in the expected direction--the various measures of driving errors showed that beginners performed worse than novice drivers and that experienced drivers had the fewest errors. Collectively, the results of the concurrent and discriminant validity studies support the use of the simulator as a valid measure of driving performance for research purposes. IMPACT ON INDUSTRY: These findings support the use of a driving simulator as a valid measure of driving performance for research purposes. Future research should continue to examine validity between on-road driving performance and performance on a driving simulator and the use of simulated driving tests in the evaluation of driver education/training programs.

Effects of age and experience on young driver crashes: review of recent literature.

OBJECTIVE: Although both youth and inexperience contribute to the elevated crash rates of teenage drivers, the relative contribution of these factors has not been firmly established. METHODS: A review was undertaken of eleven recent (1990 or newer) studies that tried to separate the crash effects of age and experience, represented by length of licensure. RESULTS: The weight of evidence is that age and experience have important, independent effects on crash risk, even after differences in driving mileage are accounted for. The studies consistently found that teenage drivers had dramatically higher crash rates than older drivers, particularly drivers older than 25, after controlling for length of licensure. Studies that distinguished 16-year-olds found that crash rates for novice 16-year-olds were higher than rates for novice 17-year-olds, but crash rates for novice 17-year-olds were not consistently higher than rates for novice 18- to 19-year-olds. With regard to experience, the weight of evidence suggests a steep learning curve among drivers of all ages, particularly teenagers, and strong benefits from longer licensure. Of the studies that attempted to quantify the relative importance of age and experience factors, most found a more powerful effect from length of licensure. CONCLUSIONS: The findings lend support to delaying licensure among teenagers in the United States, where licensure commonly is allowed at age 16, and to graduated licensing systems that phase in unsupervised driving during high-risk situations as teenagers gain independent driving experience.

Graduated licensing and beyond.

Although graduated driver licensing has successfully reduced the young driver problem in Canada and the U.S., this is still a major problem and more needs to be done. This article discusses what new measures are needed to further reduce the problem. To make graduated licensing work better, laws need strengthening; compliance needs to be enhanced through evidence-based programs involving parents, police, and adolescents; and consideration needs to be given to strengthening testing requirements. A major challenge is to integrate driver education with graduated licensing, and suggestions for doing so are provided here. There are many opportunities for building on the initial gains derived from present-day graduated systems. Taking advantage of these opportunities is likely to result in substantial crash reductions.

Driver education and graduated licensing in North America: past, present, and future.

PROBLEM: A stated objective of driver education in North America is to produce safer drivers, typically defined as drivers less likely to crash. This paper examines the extent to which driver education has achieved this objective independently as well as the extent to which such programs can support the success of graduated licensing in reducing young driver crashes. In so doing, it discusses past experiences, recent developments, and the future direction of driver education and training in relation to graduated driver licensing. METHOD: Literature review and synthesis. RESULTS: Driver education programs have yet to demonstrate consistent attainment of their safety objectives. Moreover, they have not been found to enhance the safety effectiveness of graduated licensing programs--indeed, some practices, for example, "time discounts" for driver education have actually had a detrimental effect on teen safety. DISCUSSION: Despite its disappointing safety record to date, it is important not to abandon driver education. In particular, there are opportunities to improve driver education so that it achieves its safety objectives, and ensure that programs in the future complement graduated driver licensing and contribute to its overall safety benefits. Current and future efforts to improve driver education and better integrate it with graduated licensing programs, however, need to be rigorously evaluated to determine what does and does not work to reduce young driver crashes, and as importantly, to understand why this is the case. IMPACT ON INDUSTRY: Improved driver education integrated with graduated driver licensing has potential safety benefits.

Collisions involving senior drivers: high-risk conditions and locations.

OBJECTIVES: To better understand the characteristics of crashes involving senior drivers 65 and older, studies of these crashes were reviewed. METHODS: The review focused primarily on North American studies published since 1990. Studies point to important differences between the crashes of senior drivers and those of younger drivers. RESULTS: Numerous studies have found that senior drivers' crashes are much more likely than crashes of younger drivers to occur at intersections. Senior drivers have particularly high rates of involvement in intersection crashes when they are turning, and even more so when they are turning left. Senior drivers are more likely than younger drivers to have been at fault in these situations, typically because they failed to yield the right-of-way, disregarded the traffic signal, or committed some other traffic violation. Studies also suggest that the extent of overinvolvement of senior drivers in certain types of crashes generally increases with advancing age. CONCLUSIONS: The extent to which the distinctive characteristics of senior drivers' crashes may be due to changing travel patterns associated with aging, or physical or cognitive impairments related to the aging process, is unclear. Further research is needed to understand the pre-crash circumstances of older drivers' intersection crashes.

Changes in collision rates among novice drivers during the first months of driving.

As a group, young drivers have crash rates that far exceed those of older, experienced drivers. But even among teenagers there are age-related differences; crash rates decline consistently and dramatically with each yearly increase in age. A more precise understanding of how crash rates decline within the teenage group might provide insights into when experience is most influential. To address this issue, this study examines month-to-month changes in collisions among new drivers. It was found that crash rates drop most dramatically during the first 6 months of driving. Involvement in certain types of crashes-e.g. run-off-the-road, single-vehicle, night, weekend-declines more rapidly. The findings suggest that novices improve their driving in a relatively short period of time. A graduated driver licensing system is identified as an effective method for ensuring that this development takes place in a more forgiving environment.

Trends in fatal crashes involving female drivers, 1975-1998.

Since the mid-1980s there has been concern about the growing number of female drivers in the US involved in fatal motor vehicle crashes, and similar trends have been noted in other parts of the world. The present study examined whether this trend has continued into the 1990s and the reasons for it. Fatal crash data were obtained from the Fatality Analysis Reporting System (FARS), mileage data from the National Personal Transportation Survey, and licensure data from the Federal Highway Administration. Many more women were licensed to drive in 1998 than in 1975, and on average they drove more miles. When changes in total annual mileage were taken into account, per-mile crash rates decreased similarly for men and women (about 40%). An examination of the characteristics of their fatal crashes revealed that male and female drivers have seen similar reductions in single-vehicle, nighttime, and alcohol-related crashes. However, men continue to be involved more often in these types of crashes.

The learner's permit.

PROBLEM: This paper considers the role and value of an extended learner's period in a graduated licensing system. METHOD: Review and synthesis of the literature. RESULTS: The learner's permit allows beginners to practice under supervision before attempting the road test for a driver's license. A learner's permit stage was an integral part of the "provisional" (graduated) licensing model initially formulated by NHTSA in the mid-1970s. Almost all Canadian provinces and U.S. states now have graduated licensing (GDL) programs that typically include an extended period of supervised driving. Most parents and teens favor the learner stage, and consistent with the intent of GDL, most learners are practicing and gaining driving experience under low-risk conditions. Research shows that very few learners crash while under supervision and that an extended learner stage has safety benefits. IMPACT ON RESEARCH, PRACTICE AND POLICY: Further research is needed on the safety benefits of an extended learner stage and on its optimal features.

Specific and long-term effects of Nova Scotia's graduated licensing program.

A graduated licensing (GL) program was introduced in Nova Scotia, Canada, in October 1994. Previous research has shown that it reduced collisions in the short term. The present study examined the relative contribution of each stage of the program (i.e., learner and intermediate levels) and the program's impact after beginning drivers graduated to full licensure. The research focused on teenage beginning drivers (age 16-17), but the effects on older beginners also was examined. Per-driver crash rates of two groups of novices selected from driver records in Nova Scotia were compared. One group (pre-GL) received their learner's permits during the 2 years before the program was implemented, and the second group (GL) received their learner's permits during the 2 years after implementation. The findings clearly establish that most of the collision reduction in Nova Scotia's program occurred during the first year of the program, particularly during the first 6 months when the majority of novices were driving under supervision. The collision rate for 16 to 17-year-old GL novices was 50% lower than the rate for pre-GL novices during the 6 months after they received their learner's permits, and about 10% lower during their first 2 years of licensure when unsupervised driving from midnight to 5 A.M. was prohibited. Much of this improvement for 16 to 17-year-olds occurred during restricted night hours. Collision rates also were lower during nonrestricted hours in the initial 6 months of licensure. The 3-month "time discount" for driver education provided no safety benefit, and GL novices with driver education had collision rates that were not lower than pre-GL novices. There was no long-term effect found for the program after 16 to 17-year-olds graduated to full licensure. For older beginning drivers, crash rates during the first year after obtaining a learner's permit showed a 31% reduction. This effect diminished rapidly. There was only a 2% reduction during the first year of licensure, and crash rates increased during the following 2 years. Overall the data indicate substantial benefits of graduated licensing for 16 to 17-year-old beginners, but no benefits beyond the learner stage for older beginners.