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

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

Motorists' requirements for active grade crossing warning devices. Final report.

Federal Highway Administration, Traffic Systems Division, Washington, D.C.

Daytime running lights and turn signal masking. Final report.

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

Truck escape ramp design methodology. Volume 1. Executive summary.

Federal Highway Administration, Washington, D.C.

Truck escape ramp design methodology. Volume 2. Final report.

Federal Highway Administration, Washington, D.C.

An overview of roadway delineation research. Phase III. Final report.

Federal Highway Administration, Washington, D.C.

Performance of two ice-retardant overlays. Final report.

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

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

Mode of access: Internet.

Response of asphalt concrete pavements to dynamic truck loads. Final report.

California Department of Transportation, Sacramento

Field evaluation of miles-per-gallon meters. Final report.

Transportation Systems Center, Cambridge, Mass.

Impact characteristics of glass fiber-reinforced composite materials for use in roadside safety barriers. Final report.

Federal Highway Administration, McLean Va.

Development of vehicle rollover maneuver. Volume I. Final report.

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

Development of vehicle rollover maneuver. Volume II. Executive summary report.

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

Sand ripple growth in an oscillatory-flow water tunnel /

The development of sand ripples in an oscillatory-flow water tunnel was observed in 104 laboratory experiments approximating conditions at the seabed under steady progressive surface waves. The period, T, and amplitude, a, of the water motion were varied over wide ranges. Three quartz sands were used, with mean grain diameters, D = 0.55, 0.21, and 0.18 millimeter. In 24 experiments, with the bed initially leveled, T was reduced until ripples appeared, and their development to final equilibrium form was observed without further change in T. The remaining 80 experiments investigated the response of previously established bed forms to changes in T or a or both. The ripple length, lambda, and height, eta, were measured from photos, except when bed forms were three dimensional.

The nature and testing of asphalts and asphaltic mixtures.

At head of title: The Institute of Transportation and Traffic Engineering.