Research Projects

This page contains all GHSA research projects under the NCREP and BTSCRP portfolio dating back to 2014, including both those that have been completed and are still in progress. Use the search functionality to look up projects by date, status and topic area.

The objective of this research is to review and document existing and anticipated future changes to the vehicle fleet. With this information, researchers will develop an outline of how these changes will likely affect safety performance over time and what potential changes to design and operational criteria could be developed to maximize the potential benefits.

This project tests bystander interventions to determine their effectiveness and inform development of new interventions for school-age children. 

This project collects self-reported data about over-the-counter, prescription and illegal drug use, and biological samples to detect the presence of these drugs among drivers arrested for DUI and/or DUID.

The objective of this research is to develop a framework that identifies and prioritizes the root causes of high-risk behaviors of vulnerable road users (motorcyclists, bicyclists, and pedestrians) resulting in fatalities or serious injuries, and develop effective outreach strategies for altering unsafe behavior of each vulnerable road user group.

This project evaluated five field oral fluid drug testing devices to assess their accuracy, reliability, performance to manufacturer specification, susceptibility to interference, and resistance of the consumables to extremes of temperature and humidity.

The objective of this research is to develop a scalable evaluation framework and methodologies to determine the effectiveness of combined law enforcement / engagement for reducing crashes and their severity involving road user behaviors such as impaired driving, lack of seat belt use, distracted driving, and speeding.
The objective of this research is to evaluate and measure the effectiveness of the current on-road driver skills tests and test scoring methods and develop guidance that include methods for on-road driver skills test administration and scoring that predicts high safety risk.
The objective of this research is to identify emerging behavioral safety issues arising from the expanding use of e-scooters, both rental and privately owned, and develop comprehensive guidance to help affected agencies plan for and mitigate related safety problems.

This project seeks to assess features in an Interlock Enhancement Counseling program by comparing treatment and control groups.

The objective of this research is to develop a guide to identify and prioritize the types of behavioral interventions needed to improve child passenger safety in the for-hire rideshare environment, including taxis.

This project examines how states’ DWI systems evolve with the legalization and decriminalization of marijuana.

This project examines how states’ DWI systems evolve with the legalization and decriminalization of marijuana.

This research reviewed distracted driving laws, enforcement and public education practices across the United States and Canada to develop a library of resources and best practices that states and other stakeholders can use to enact or revise their laws and enhance enforcement and education efforts.
The objective of this research is to document the components of existing U.S. and international employer-based behavioral traffic safety programs.
The objective of this research is to develop a guide for the use of variable message signs (VMS) to deliver behavioral traffic safety announcements.

This project explores the effects of modules to train novice drivers in (1) hazard identification and (2) the risks associated with using electronic devices while driving on their subsequent crash and citation rates.

This project explores opportunities to increase police participation in high-visibility enforcement (HVE) efforts through innovative strategies that address specific challenges.

The objective of this research is to develop a behavioral traffic safety countermeasure toolkit for highway safety partners involved with rural road safety.
This project identifies access management techniques and quantifies their impacts on driving behaviors using available data.
The objective of this research is to develop and test a conceptual safety framework for evaluating the association between distracted driver behaviors and roadway and roadside infrastructure.
The objective of this research is to assess best practices in crash diagnosis across crash types in modal diverse contexts, recognizing that vehicle and mode mix matters in the success of investment strategies.

This project seeks to identify the major data sources of drug-impaired driving information by listing the various sources of data on drug use and drugged driving and noting the strengths and weaknesses of each.

This project synthesizes various studies evaluating the effectiveness of speed feedback signs to reduce speeding and speeding-related crashes.

The objective of the proposed study is to investigate safety issues unique to moped and motor scooter riding, and to connect those findings with practical policy recommendations and educational programs. The research will also develop a web-based tool that can allow state safety offices or other stakeholders to create social media graphics, posters, and other visual content related to moped/motor scooter safety.

Through a focus group of motorcycle riders, the report finds that while most participants did not regularly wear such gear, those who did reported doing so after having been in a crash with a motor vehicle, or personally knowing another rider who had been in such a crash.

The objective of this research is to develop guidance for MPOs and SHSOs to improve coordination on local and regional behavioral safety efforts to reduce the frequency and severity of traffic crashes.
The objective of this research is to develop a scalable framework for state highway safety offices that identifies components and examples of successful traffic safety public education and awareness efforts, outlines the critical components and steps for conducting and evaluating such efforts, and provides a framework for how to implement and evaluate efforts.

This project seeks to determine the use of on-site oral fluid testing devices in the U.S. and abroad, scan agency protocols and examine legal issues regarding their use.

This project examines existing risk communication strategies for impaired and distracted driving, reviewing messages and materials, theories and models of behavior change, risk communication, and communication theory and how these are relevant to impaired and distracted driving.

This project focuses on risk communications for seat belt safety, consisting of a literature review of theories of behavior change and communications theory and their relevance to vehicle occupant protection as well as review and catalog existing messages.

This project included a scan of publicly available SHSO social media channels and a series of interviews with NHTSA Regional Offices and a sample of nine SHSOs.

This project conducted a preliminary qualitative research on the feasibility of using ALPRs as countermeasures to improve traffic safety. 

This project provides an inventory of state-managed interlock programs, lists their key program elements and discusses how states manage their ignition interlock device data. Recruitment and data collection for this project were delayed due to COVID-19 but are underway.

The objective of this research is to develop a guide for state highway safety offices to enhance older driver safety.

This project conducts a scan of LEL programs across the states including position descriptions, program objectives, reporting requirements and performance strategies. The Phase 1 final report is under review, with Phase 2 case studies underway.

This project involves developing a white paper summarizing research on the connection between THC use and driving performance and the likelihood of increased crash risk as well as the impact of marijuana per se limits and laws.

This project performs a meta-analysis to evaluate the tools law enforcement agencies and partners use to assess the level of enforcement needed to have a deterrence effect in their communities.

This project develops criteria for performance standards, identifies approaches, identifies factors to assess performance, develops statistical models, determines the optimal model and develops it into a tool for application, and tests the tool in various locations.

The objective of this research is to develop a methodology that enables and facilitates tracking of traffic court cases from citation or arrest to final disposition.
The objective of this research is to develop a research agenda for teen driver behavioral safety countermeasures using data from the Strategic Highway Research Program 2 (SHRP2) Naturalistic Driving Study (NDS).