Citation

Dudek CL, Messer CJ. Highw. Res. Rec. 1973; 469: 1-15.

Copyright

(Copyright © 1973, National Research Council (U.S.A.), Highway Research Board)

DOI

unavailable

PMID

unavailable

Abstract

An experimental warning system has been installed on the inbound control section of the gulf freeway as a means of alerting drivers approaching crest vertical curves of stoppages downstream of the crest. Automatic control of the warning system dictated the need to identify measurable traffic parameters that indicate the presence of a stoppage wave. This paper presents an analysis of selected speed and energy parameters as indicators of stoppage waves. The results demonstrate that both the speed and energy parameters perform satisfactorily. Based on the results of the investigation, a digital computer control algorithm was structured for automatic control of the warning system. Recommendations are presented for detector placement.

Language: en

Keywords

HIGHWAY TRAFFIC CONTROL; HIGHWAY SIGNS, SIGNALS AND MARKINGS