An official website of the United States government.
Here's how you know
The .gov means it's official.
Federal government websites always use a .gov or .mil domain. Before sharing sensitive information online, make sure you’re on a .gov or .mil site by inspecting your browser's address (or "location") bar.
This site is also protected by an SSL (Secure Sockets Layer) certificate that's been signed by the U.S. government. The https:// means all transmitted data is encrypted — in other words, any information or browsing history that you provide is transmitted securely.
Walking is an important part of a healthy, sustainable transportation system. Yet walking is too often inaccessible, uncomfortable, or unsafe as a practical option for large numbers of people because of traffic risk, discomfort, or inconvenience. Multilane roadways, higher design and posted speeds, and a lack of safe and convenient pedestrian walking and crossing facilities […]
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 […]
Speeding remains a serious threat to safe mobility, contributing to nearly 30% of motor vehicle fatalities. Despite this, the AAA Foundation’s Traffic Safety Culture Index shows that many drivers view speeding as less dangerous than other risky behaviors, while speeding remains both the most common and, for many, the only risky driving behavior they report. Although proven countermeasures such as automated speed enforcement […]
Security vulnerabilities in the Connected and Autonomous Vehicle (CAV) software can allow hackers to perform malicious actions ranging from draining batteries and taking control of the steering wheel to disabling the alarm system. CAV software is subject to several cyber-attacks including memory corruption, code injection, remote code execution, and malware attacks. This study develops a […]
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 […]
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 […]
The safety of roadside responders is often placed in jeopardy by the potential dangers posed by passing vehicles. To develop and implement effective protection measures for roadside responders, comprehensive safety data is essential. Previous studies have examined existing data sources to document the characteristics of incidents in which roadside responders were killed while working at […]
A statistical projection of traffic fatalities for the first quarter of 2026 shows an estimated 7,770 people died in motor vehicle traffic crashes, a decrease of about 4.3 percent compared to the 8,120 fatalities projected to have occurred in the first quarter of 2025 (Early Estimates of Motor Vehicle Traffic Fatalities and Fatality Rate in […]
he goal of this work was to explore whether the complexity of different rural intersections influenced driver trust and comfort in a conditionally automated vehicle (i.e., Level 3 SAE) navigating the intersection for them. In an online survey platform (UMN Qualtrics), 271 participants watched five brief curated videos of a simulated automated vehicle navigating different […]
Google has officially launched its Large Vehicle Routing (LVR) system, a routing platform built specifically for trucking and bus fleets, now generally available across the U.S. through the company’s Routes API, Route Optimization API, and Navigation SDK. The move addresses a long-standing gap in commercial routing technology. Most mapping and navigation tools are built around […]