Left turn signals for Arizona. Final report.

Arizona Department of Transportation, Phoenix

Driver understanding of work zone flagger signals and signaling devices. Interim report.

Texas State Department of Highways and Public Transportation, Transportation Planning Division, Austin

Variable message signing for traffic surveillance and control - a state of the art report. Final report.

Mode of access: Internet.

Potential means of cost reduction in grade crossings motorist-warning control equipment. Volume II: comparison of solid state and relay devices and techniques. Final report.

Transportation Systems Center, Cambridge, Mass.

Human factors requirements for real-time motorist information displays. Volume 2: state-of-the-art: messages and displays in freeway corridors. Final report.

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

Application of positive guidance at a reverse curve/narrow bridge site in Washington state. Final report.

Federal Highway Administration, Demonstration Projects Division, Arlington, Va.