The report is concerned with the development of a safety warning system for urban freeways to warn motorists approaching crest type vertical curves of stoppage waves downstream of the crest. Several candidate systems were proposed and evaluated. The recommended design concept is a traffic-actuated safety warning device which would be located upstream of the overpass crest and which would be activated when conditions warrant. Detectors installed on each lane and located strategically on both sides of the overpass transmit traffic information to an IBM 1800 digital computer located in the control system. The computer activates and deactivates the warning device according to preestablished criteria. Manual override features would be built into the system so that all controls could be accomplished manually if desired.
Design of a Safety Warning System Prototype for the Gulf Freeway
1972
37 pages
Report
Keine Angabe
Englisch