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

Federal Highway Administration, Washington, D.C.

Using light emitting diodes in traffic signals -- final report.

Federal Highway Administration, Washington, D.C.

User guide for removal of not needed traffic signals.

Federal Highway Administration, Washington, D.C.

A study of clearance intervals, flashing operation, and left-turn phasing at traffic signals. Volume 1: sumary report. Final report.

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

A study of clearance intervals, flashing operation, and left-turn phasing at traffic signals. Volume 2: clearance intervals. Final report.

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

A study of clearance intervals, flashing operation, and left-turn phasing at traffic signals. Volume 3: flashing operation. Final report.

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

An evaluation of stop signs used with flashing traffic signals. Final report.

Turner-Fairbank Highway Research Center, McLean, Va.

Visibility and comprehension of pedestrian traffic signals /

"May 1997."

Criteria for removing traffic signals, technical report /

Mode of access: Internet.

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

Federal Highway Administration, Washington, D.C.

Evaluation of flashing traffic signal operation. Final report.

Texas Department of Transportation, Austin

Traffic operations control for older drivers. Final report.

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

Guidelines for flashing traffic control devices. Final report.

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

Advance traffic control warning systems for maintenance. Final report.

Federal Highway Administration, Baton Rouge, Fla.

Detection devices to optimize computerized traffic control. Final report.

Federal Highway Administration, Washington, D.C.