U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
Welcome to the Federal Highway Administration's (FHWA) Nighttime Visibility website. This site contains information about three important areas that impact nighttime visibility. Adequately maintained retroreflective signs, pavement markings, and roadway lighting improve nighttime highway visibility and reduce the risk of crashes by increasing visibility for drivers and other roadway users.
What's New: Synthesis of recent research focused on longitudinal pavement markings, Research regarding daytime chromaticity and luminance of retroreflective sign materials, and a summary report of a vision and visibility workshop.