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: On August 5, 2022, FHWA published a final rule in the Federal Register, which has been incorporated into 2009 MUTCD Revision 3 adding provisions for Maintaining Minimum Pavement Marking Retroreflectivity. More info.