Citation

Chang MS, Messer CJ. Transp. Res. Rec. 1985; 1010: 29-37.

Copyright

(Copyright © 1985, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

The objective of the work described in this paper is to establish volume guidelines for the installation of traffic signal control at diamond interchanges where the base condition is all-way stop sign control. The guidelines are based on operational threshold values of traffic flow, above which signalization is expected to produce superior performance. Four diamond interchanges were studied with both types of control, from which the study results were based. The data-collection methods and procedures employed in the study to evaluate the operational effects of stop sign and signal control at diamond interchanges are discussed. An assessment of traffic control alternatives is described in terms of operational effects of queues and travel speed. Guidelines for all-way stop signs or signal control at diamond interchanges are provided in terms of internal volume, left-turn proportion within internal volume, and the sum of internal and external volume. The specific traffic volume guidelines were developed based on a combination of these variables, which affect operational performance.

Language: en

Keywords

TRAFFIC SIGNS, SIGNALS AND MARKINGS; HIGHWAY SYSTEMS; STREET TRAFFIC CONTROL