Reduced lighting on freeways during periods of low traffic density. Final report.

Federal Highway Administration, Office of Safety and Traffic Operations, Washington, D.C.

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

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

Day and night intensities of rear signal system lights.

National Highway Safety Bureau, Washington, D.C.

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

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

Interaction between fixed and vehicular illumination systems. Phase II. Interim report.

Federal Highway Administration, Office of Research, Washington, D.C.

Sign legibility for modified messages. Final report.

Virginia Department of Transportation, Richmond

Alternative incandescent traffic signal lamps and systems for improved optical and energy efficiency. Final report.

Federal Highway Administration, Office of Safety and Traffic Operations Research and Development, Washington, D.C.

Retroreflective requirements for traffic signs - a STOP case study. Final report.

Mode of access: Internet.

Minimal luminance requirement for official highway signs. Final report.

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

New directions in roadway lighting.

Federal Highway Administration, Washington, D.C.

Space-charge limit and confinement in particle acceleration with high-intensity light waves /

"AEC Contract AT(04-3)-400."

Absolute photometry of the light of the night sky ; the zenith intensity of Haleakala (latitude N 20.7 degrees) and at Fritz Peak (latitude N 39.9 degrees) /

Includes bibliography.