Evaluation of Adirondack Park highway signs. Final report.

Federal Highway Administration, Washington, D.C.

Relative visibility of increased legend size vs. brighter materials for traffic signs. Final report.

Federal Highway Administration, Office of Safety and Traffic Operations Research and Development, McLean, Va.

Driver perception of just-noticeable differences of automotive signal lamp intensities. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Detectable warning surfaces: color, contrast, and reflectance.

Federal Transit Administration, Washington, D.C.

Information content at night of roof-mounted emergency vehicle lights. Final report.

Transportation Department, Office of University Research, Washington, D.C.

VSDSS, research studies. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Sign legibility for modified messages. Final report.

Virginia Department of Transportation, Richmond

Development of standards and tests for acceptance of traffic signal lenses. Final report.

Federal Highway Administration, Washington, D.C.

A study of daytime running light design factors. Final report.

National Highway Traffic Safety Administration, Crash Avoidance Research Division, Washington, D.C.

Efficacy of red and yellow turn arrows in traffic signals. Final report.

Federal Highway Administration, Washington, D.C.

Experiment in assessing color separation techniques for identifying small density variations in tires. Interim report.

National Highway Traffic Safety Administration, Research Institute, Washington, D.C.

Minimum retroreflectivity requirements for traffic signs: summary report.

Mode of access: Internet.