The Effects of the All-Red Clearance Interval on Intersection Accident Rates in Indiana

Authors

Brian Alan Roper
Jon D. FrickerFollow
Kumares C. Sinha
Robert E. Montgomery, Indiana Department of TransportationFollow

Recommended Citation

Roper, B. A., J. D. Fricker, K. C. Sinha, and R. E. Montgomery. The Effects of the All-Red Clearance Interval on Intersection Accident Rates in Indiana. Publication FHWA/IN/JHRP-90/07. Joint Highway Research Project, Indiana Department of Transportation and Purdue University, West Lafayette, Indiana, 1990. https://doi.org/10.5703/1288284313432

DOI

10.5703/1288284313432

Abstract

The research reported is an evaluation of all-red clearance intervals as the second phase of a project involving traffic signal operation. The first phase of the project dealt with leading versus lagging left turn signal phasing. The study analyzed both the short-term and long-term effects of all-red interval on accident rates in Indiana using accident records for the years 1981 to 1987. The results contradict those of previous studies. Statistical tests indicated that all-red clearance intervals did not cause a reduction in accident rates at the intersections studied in Indiana.

Report Number

FHWA/IN/JHRP-90/07

Keywords

all-red clearance interval, accident rate, traffic signal, safety

Project Number

C-36-17QQ

File Number

8-4-43

Performing Organization

Joint Highway Research Project

Publisher Place

West Lafayette, IN

Date of this Version

1990