SPEED ADVISORY INFORMATION FOR REDUCED VISIBILITY CONDITIONS. EXECUTIVE SUMMARY
The objective of this research project was to develop preliminary design specifications for a speed advisory system for use during periods of reduced visibility (fog). Phase I of the program consisted of developing the necessary facilities, equipment and procedures to conduct controlled experimentation under various levels of fog density. Phase II consisted of a series of interrelated experiments to identify optimum advisory information (sign messages and speed values), and the number, locations, and interconnections between signs which would result in the smoothest traffic flow. Phase III utilizes the information from Phase II, as well as the pertinent literature, to develop preliminary specifications for a full-scale advisory system for use on the public highway. This Executive Summary provides an overview of the pertinent findings of this project as well as the preliminary designs for several levels of advisory systems which could be utilized for different severities of reduced visibility problems. The final technical report has been published separately as Report No. FHWA-RD-78-32. (FHWA)
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Corporate Authors:
Oregon Department of Transportation
140 Transportation Building
Salem, OR United States 97310Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Authors:
- Wagner, D R
- Publication Date: 1978-5
Media Info
- Pagination: 7 p.
Subject/Index Terms
- TRT Terms: Design; Driver information systems; Equipment; Experiments; Fog; Specifications; Speed; Traffic flow; Traffic signals; Visibility
- Uncontrolled Terms: Reduced visibility
- Subject Areas: Design; Highways; Safety and Human Factors; I85: Safety Devices used in Transport Infrastructure;
Filing Info
- Accession Number: 00335962
- Record Type: Publication
- Report/Paper Numbers: FHWA-RD-78- 80 Exec Sum, FCP 31LH-032
- Contract Numbers: DOT-FH-11-7950
- Files: TRIS, USDOT, STATEDOT
- Created Date: Dec 22 1981 12:00AM