Citation

Richards SH. Transp. Res. Rec. 1981; 819: 20-22.

Copyright

(Copyright © 1981, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

The results of preliminary field studies conducted at six commercial driveways to evaluate exiting vehicle paths at undivided two-way driveways are presented. Vehicle position data for several hundred exit maneuvers were collected at each driveway and analyzed. Due to the preliminary nature of the studies, no attempt was made to gather data on the volume of street traffic or information about vehicles entering the driveways. The studies suggest that encroachment by exiting traffic over the midpoint of undivided two-way driveways is fairly common, especially if the driveways have no centerline markings. They also indicate that driveway width, the type of driveway maneuver, and the presence of centerline markings greatly influence the paths taken by motorists exiting a driveway. Based on the study results, the use of centerline markings is recommended at high-volume driveways on arterial streets.