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.
TRB’s National Cooperative Highway Research Program (NCHRP) Report 790: Factors Contributing to Median Encroachments and Cross-Median Crashes investigates the factors that contribute to median-related crashes and identifies design treatments and countermeasures that can be applied to improve median safety on divided highways.