Visibility research is directed toward near-term improvement of visibility on and along roadways and traffic control devices to enhance the safety of road users. Visibility research also promotes opportunities that advance new cost-effective practices and technologies. 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 focus area that provides technical support to the lane departure segment of roadway departure, 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.