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Emerging technologies present many potential challenges to state departments of transportation (DOTs) and other agencies that own and manage the existing infrastructure. Significant uncertainty exists about which changes are most likely to occur and where the largest impacts could be, hampering an effective national alignment in policy and approach. NCHRP Research Report 1090: Risks Related […]
The high-voltage battery pack of an electric vehicle is often the main weapon of choice for people who have never driven an EV but like to discredit the technology. “It won’t last more than a couple of years” is a sentence that I’ve heard time and time again when talking to gas car enthusiasts about […]
Traffic control devices, markings, signals, guardrail, computing systems, communications infrastructure, and other permanent and temporary devices will likely each be affected by the operation of connected and autonomous vehicle (CAV) technology. State departments of transportation (DOTs) need to identify gaps in knowledge and skills and prepare for the challenges of CAV implementation while maintaining the […]
Generative Artificial Intelligence (AI) is redefining how people interact with public information and shaping how public data are consumed. Recent advances in large language models (LLMs) mean that more Americans are getting answers from AI chatbots and other AI systems, which increasingly draw on public datasets. The federal statistical community can take action to advance […]
Cars, trucks, and other vehicles can emit air pollutants harmful to human health. CMAQ supports projects in areas that do not currently, or did not in the past, meet federal air quality standards for certain air pollutants—carbon monoxide, ozone, or particulate matter. The Infrastructure Investment and Jobs Act provided about $2.7 billion for CMAQ in […]
Roadway fatalities and serious injuries are a significant public health concern in rural and tribal settings. Creating a coalition of interested individuals is part of the Safe System Approach that addresses the high rates of these fatalities and serious injuries. BTSCRP Research Report 8: Highway Safety Behavioral Strategies for Rural and Tribal Areas: A Guide, […]
The National Highway Traffic Safety Administration recently issued a projection report of traffic fatalities and the fatality rate per 100 million vehicle miles traveled (VMT) for 2024 (Early Estimate of Motor Vehicle Traffic Fatalities in 2024, Report No. DOT HS 813 710). That report shows an estimated 39,345 people died in motor vehicle traffic crashes […]
Examining the behavior of drivers to encourage safe operation of vehicles is one of the core research areas at the AAA Foundation for Traffic Safety. This technical report presents research findings on one such driver behavior, distracted driving, because it remains a significant traffic safety concern. Technology-based countermeasures such as smartphone blocking features can effectively […]
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 […]
State departments of transportation (DOTs) undertake numerous bridge replacements annually. Specific replacements present unique challenges among these projects due to location restrictions, mobility implications, design characteristics, and environmental constraints. NCHRP Synthesis 645: Construction Strategies and Techniques for Planned Bridge Replacements in Complex Scenarios, from TRB’s National Cooperative Highway Research Program, documents practices and decision-making used […]