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Read the latest news and announcements from traffic safety interest groups and about traffic safety topics here.
This study explored the feasibility and acceptability of using stay in-place fiberglass reinforced plastic (FRP) jackets and underwater steel reinforced grout for timely bridge piling repairs in Minnesota without dewatering. One of the goals of the project was to determine the current state of practice to this corrosion repair and inspection by researching other projects […]
Artificial intelligence (AI) has revolutionized various areas in departments of transportation (DOTs), such as traffic management and optimization. Through predictive analytics and real-time data processing, AI systems show promise in alleviating congestion, reducing travel times, and enhancing overall safety by alerting drivers to potential hazards. AI-driven simulations are also used for testing and improving transportation […]
As separated on-street bicycle lanes become increasingly common, many state departments of transportation (DOTs) and local agencies have installed them to address safety concerns and promote cycling. Research was needed to provide state DOTs with detailed information on the anticipated safety benefits of bicycle network design features across various contexts, the relationship between these features, […]
GHSA’s analysis of preliminary data provided by State Highway Safety Offices (SHSOs) found that while pedestrian deaths during the first six months of 2024 fell slightly from the year before, they are 12% higher than 2019 and up a shocking 48% since 2014. Over the last decade, deaths of people on foot have risen at a pace […]
Roundabout implementation in the United States has increased in the last decade, and practitioners have learned lessons in successfully applying roundabouts in various land use and transportation environments and contexts. The TRB National Cooperative Highway Research Program’s NCHRP Research Report 1043: Guide for Roundabouts provides information and guidance on all aspects of roundabouts. Read the full guide […]
In this paper we provide a simple and intuitive story for supply chain disruptions driven by the rigidities in the transportation sector. Focusing on maritime shipping, we argue that the frequent macroeconomic shocks that shape demand for transportation, meet a highly inelastic supply curve for transportation services. The steepness is driven by equilibrium bottlenecks in […]
State transportation agencies have many tools available with which to maintain pavements proactively. These include tools such as pavement management systems to track roadway conditions and life cycle cost analysis tools. NCHRP Synthesis 623: Wintertime Pavement Maintenance Practices, from TRB’s National Cooperative Highway Research Program, documents the current state DOT practices for the reactive pavement […]
This report builds on the foundation established by three earlier congressional reports required under the Fixing America’s Surface Transportation Act (FAST Act), enacted in 2015. Section 24104 mandated biennial analyses of vehicle safety recall completion rates, culminating in the submission of the final required report in compliance with this directive in 2020. These reports incorporated […]
This study examined the degree to which an in-vehicle signal countdown timer influenced human drivers’ intersection approaching behaviors and decisionmaking. Secondarily, the study compared intersection approaching behaviors between human drivers and automated shuttles. The research team further simulated predicted behaviors of human drivers at lower speeds and predicted behaviors of shuttles at higher speeds. The […]
TRB’s National Cooperative Highway Research Program (NCHRP) Research Report 889: Performance Measures in Snow and Ice Control Operations presents approaches for monitoring the performance of snow and ice control activities by public agencies and proposes a core set of performance measures that can be customized and used by agencies to meet their snow and ice […]