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.
The aging of the population in the United States (U.S.), particularly the “baby boomers,” is bringing about new challenges to maintaining safe mobility for older adults that are well recognized in the transportation community. As research continues to better understand and respond to these challenges, three complementary and interdependent goals have emerged: 1) to help […]
Highway IDEA is one of three IDEA programs managed by the Transportation Research Board (TRB) to foster innovation in highway and intermodal surface transportation systems. Highway IDEA nurtures new concepts for technologies, methods, and processes for application to highway systems in broad technical areas such as highway design and construction, materials, operations, and maintenance. Read […]
Walking, biking, and other sustainable modes of transportation are critical options in communities throughout the United States, particularly for economically disadvantaged communities. However, fatalities among pedestrians and bicyclists have been increasing even faster than the overall fatalities among all road users, which has drawn a focus on the safety of vulnerable road users (defined below). […]
The number and rate of traffic fatalities in the U.S. surged starting in 2020, even as the rate of vehicle travel plunged while the nation grappled with the impact of the COVID-19 pandemic. This trend of increasing traffic fatalities continued in 2021, as vehicle travel returned to near pre-pandemic levels. From 2021 to 2022 the […]
Developing country megacities suffer from severe road traffic congestion, yet the level of congestion is not a direct measure of equilibrium inefficiency. I study the peak-hour traffic congestion equilibrium in Bangalore. To measure travel preferences, I use a model of departure time choice to design a field experiment with congestion pricing policies and implement it […]