U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590

Skip to content U.S. Department of Transportation/Federal Highway AdministrationU.S. Department of Transportation/Federal Highway Administration

Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations


Visibility is directed towards research for near-term improvement of the visibility on and along the roadway and of traffic control devices to enhance the safety of road users. Visibility also promotes opportunities that advance new practices and technologies to improve visibility on a cost-effective basis. Some examples include investigations into the effectiveness of innovative means of marking, signing, signaling and lighting through direct photometric and/or colorimetric measurements, and by supporting human factors studies of the effectiveness of new technologies

Visibility is a crosscutting program that provides technical support to the lane departure segment of Roadway Departure, as well as the Intersections, Pedestrians and Bicyclists, and Comprehensive Approach to Safety focus areas. Primary research areas include the safety impacts of roadway lighting, traffic control devices technology, and development of models of the visual information available to road users and the level of visual information required for appropriate performance.

Other Links About This Topic

Arens Photometric and Visibility Laboratory – Evaluations of photometric and colorimetric properties of signage, pavement marking, and traffic signals.
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000
Turner-Fairbank Highway Research Center | 6300 Georgetown Pike | McLean, VA | 22101

All Federal Highway Administration (FHWA) information technology systems will be unavailable, Friday, December 2, at 10:00 p.m. to Sunday, December 04, at 11:59 p.m., EDT, while work is being performed on the network. During that time, users will not be able to access any FHWA systems.

If you have any questions or problems, please contact the 5-Help Service Center @ (866) 466-5221 or 5-HelpServiceCenter@dot.gov.