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The Effects Of The All-Red Clearance Interval On Intersection Accident Rates In Indiana, Brian Alan Roper, Jon D. Fricker, Kumares C. Sinha, Robert E. Montgomery
The Effects Of The All-Red Clearance Interval On Intersection Accident Rates In Indiana, Brian Alan Roper, Jon D. Fricker, Kumares C. Sinha, Robert E. Montgomery
JTRP Technical Reports
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.