Behaviors and Attitudes
NHTSA studies behaviors and attitudes in highway safety, focusing on drivers, passengers, pedestrians, and motorcyclists. We identify and measure behaviors involved in crashes or associated with injuries, and develop and refine countermeasures to deter unsafe behaviors and promote safe alternatives.
NHTSA’s recently published reports are listed chronologically below. To the right are additional resources including Behavioral Research Notes and Traffic Techs. The most recent Behavioral Research Note is dated October 2017. The most recent Traffic Tech is dated September 2017.
Drug and Alcohol Crash Risk: A Case-Control Study
This study used a “case-control” design to estimate the risk of crashes involving drivers using drugs, alcohol or both obtaining 10,221 breath samples, 9,285 oral fluid samples, and 1,764 blood samples from more than 3,000 crash drivers and 6,000 control drivers. Crash risk estimates for alcohol indicated drivers with BrACs of .08 g/210L is 3.98 times that of drivers with no alcohol.
2013-2014 National Roadside Study of Alcohol and Drug Use by Drivers: Alcohol Results
This is 1 of 3 reports on our 2013-2104 National Roadside Survey – this report focuses on the Alcohol Results. The results showed a continuing reduction in alcohol-positive drivers on weekend nights – to 8.3% during our study. The results were announced during an event in early 2015.
Medical Review Practices For Driver Licensing Volume 1: A Case Study of Guidelines and Processes in Seven U.S. States
This is the first of three reports examining driver medical review practices in the United States and how they fulfilled the basic functions of identifying, assessing, and rendering licensing decisions on medically at-risk drivers, documenting strengths and weaknesses of a variety of approaches. This report presents the methods used to group the diverse medical review practices across the 51 driver licensing agencies into four broad medical review structures, describes selection of States for case study, and identifies strengths and weaknesses associated with each of the four medical review structures. The seven States were Maine, North Carolina, Texas, Wisconsin, Ohio, Washington, and Oregon.
More Cops More Stops: Evaluation of a Combined HVE Program in Oklahoma and Tennessee
This report evaluates the “More Cops More Stops” combined enforcement program in Oklahoma and Tennessee, letting the traffic safety community make better informed programming decisions. This evaluation provides little evidence to support the continued use of MCMS to enhance the effect of CIOT and DSOGPO.
Expanding the Seat Belt Program Strategies Toolbox: A Starter Kit for Trying New Program Ideas
Researchers examined behavioral-change strategies proven effective in education, healthcare, advertising as possible approaches to increase seat belt use. This report is the result, a "starter kit" of ideas of varying levels of readiness so occupant protection programmers can use them in seat belt programming across the country. Five strategies include high school service-learning programs, hospital discharge programs, targeted online advertising, online learning and e-learning, and product/message placement.
Evaluation of a Rural Seat Belt Demonstration Program in Florida, Georgia, and Tennessee
Three southeastern States initiated high-visibility enforcement campaigns to address lower seat belt use in their rural areas than in non-rural areas. Florida, Georgia, and Tennessee conducted four waves of intensified enforcement and media from November 2008 to May 2010. The May campaigns were conducted just prior to the national Click It or Ticket campaigns. Combining activity, awareness and usage data from all three States, there was a significant positive correlation between media expenditures and awareness of rural seat belt messages. Two awareness indices correlated highly with usage and achieved statistical significance: awareness of rural seat belt messages and perceived risk of a ticket for not buckling up. While the significant correlations between awareness measures and belt usage suggest that the message got through to drivers, comparison of changes in belt use in the RDP versus the control areas produced mixed results. Seat belt usage increased significantly in the targeted rural areas of all three States, but it also increased at about the same rate in the control areas in two of the States.
2013–2014 National Roadside Study of Alcohol and Drug Use by Drivers: Methodology
This report describes the methodology for the National Roadside Study (NRS), a national field study to estimate the prevalence of alcohol-, drug-, and alcohol-plus-drug-involved driving primarily among nighttime weekend drivers, but also daytime Friday drivers.
Marijuana, Other Drugs, and Alcohol Use by Drivers in Washington State
In Washington State legal sale of marijuana began July 8, 2014. A voluntary, anonymous roadside study was conducted to assess the prevalence of drivers testing positive for alcohol and other drugs including marijuana on Washington’s roads. Data was collected in three waves, before implementation of legal sales, about 6 months after implementation, and one year after implementation. Of almost 2,500 participants, 14.6 percent of drivers, 19.4 percent of drivers, and 21.8 percent of drivers were THC-positive in Waves 1, 2, and 3, respectively.
Video and Non-Video Feedback Interventions for Teen Drivers
In-vehicle feedback technologies help parents teach their adolescent drivers. While feedback technologies have been shown to reduce some risky driving behavior, teens and parents’ privacy concerns deter some families from using them, especially technologies that include video. This study evaluated two similar technology-based systems, one with and one without video, to determine how much they reduced unsafe driving behavior in newly licensed teen drivers.
Survey of DWI Courts
NHTSA conducted a web-based survey of DWI Courts and DWI/Drug Courts (court programs that handle both DWI and drug offenders) in April/May 2015 in order to obtain detailed information on how DWI Courts were operating. NHTSA conducted the survey in collaboration with the National Center for DWI Courts, who alerted State Drug Court Coordinators to the survey, supported NHTSA webinars that described the survey, and provided NHTSA with contact information for the court programs. A total of 156 courts responded to the survey from a contact list of 473.
For Access to older content please go to our archived Research page.