Category: Analysis & Data

  • September 11th, 2026

This report provides an overview of the cultural environment of driving in the United States, explores drivers’ perceptions of road safety, and examines links between perceived neighborhood driving behaviors, self-appraisals of behavior and abilities, and perceived social stress on self-reported engagement in risky driving behaviors. Similar to previous Traffic Safety Culture Index reports, this edition […]

  • September 11th, 2026

The original scope of this work was intended to examine the relationship between changes in police traffic enforcement—particularly reductions in traffic stops—and roadway safety outcomes across multiple jurisdictions using a case-control design. Due to limitations in the availability of and trends in relevant data across sites, findings of the case studies presented in this report […]

  • September 11th, 2026

Utilities are essential services that often occupy the public right-of-way along roads. While utility access benefits both service providers and the public, utility facilities can complicate highway construction, especially roadway expansion projects. Transportation agencies identify utilities requiring relocation through coordination with utility owners during project planning and design. However, no process or technology can guarantee […]

  • August 7th, 2026

The national estimate of seat belt use by adult front-seat passengers of passenger vehicles in 2025 was 91.3 percent, not statistically different (at the .05 level) from 91.2 percent observed in 2024. This estimate represents the percentage of occupants who are belted during an average daylight moment. Seat Belt Use in 2025

  • July 27th, 2026

Waymo’s driverless cars are involved in fewer crashes than human drivers, but the federal system for monitoring automated vehicles needs improvement, a new study from the Insurance Institute for Highway Safety shows. Per vehicle mile traveled (VMT), Waymo’s driverless vehicles deployed in San Francisco, Phoenix, Los Angeles and Austin were involved in 68% fewer crashes than human […]

  • June 29th, 2026

Advances in automotive technology aim to enhance traffic safety beyond the capabilities of earlier vehicles. Vehicle technologies have progressed from basic assistance systems to higher levels of automation, including services like robotaxis. As these technologies continue to develop, it is essential to understand how drivers’ perceptions and attitudes toward these systems are evolving. Examining these […]

  • June 9th, 2026

Traffic volume data are used by state departments of transportation (DOTs), metropolitan planning organizations (MPOs), and other local agencies in various analyses and functions related to transportation planning, design, traffic operations, safety, pavement design and maintenance, enforcement, environmental analysis, and construction, among others. Leveraging Existing Traffic Signal Assets to Obtain Quality Traffic Counts