Citation

Lyles RW. Transp. Res. Rec. 1980; 782: 22-30.

Copyright

(Copyright © 1980, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

An experiment to evaluate the effectiveness of several different signs (or sign sequences) in informing motorists of an intersection on the road ahead in rural two-lane situations is described. Typically, intersections that would require these treatments would be those where stopping sight distances for prevailing speeds were inadequate. As random motorists approached and passed through two test intersections, they were "tracked" by means of a data-collection system that collected time intercepts of motorists at 60-m (200-ft) intervals in the vicinity of the intersection. These data were supplemented by manually collected vehicle registration and classification data and, in selected instances, survey data collected from motorists who had passed through the intersections. The results essentially showed that a regulatory speed-zone configuration and lighted warning signs were more effective than more traditional unlighted warning signs in reducing motorists' speeds in the vicinity of the intersection and increasing their awareness of both the signs and conditions at the intersection.