Citation

Zuehlke R. IMSA J. 2002; 40(4): 42-43.

Copyright

(Copyright © 2002, International Municipal Signal Association)

DOI

unavailable

PMID

unavailable

Abstract

This article offers basic steps for carrying out an accurate collision analysis at high-collision locations. Identifying the location to be studied by taking at least 3 years' worth of statistics to reduce chance of skews is stressed. Since road segments are usually one category and intersections another, ten or more collisions at either in a year is considered high. Accident reports must be read carefully for errors and for types of injuries and damage to determine severity. Rates are calculated based on traffic volume. Locations can be ranked, and the highest-ranked location is charted with a diagram showing where each occurred. Map out the physical components of the site and detail the types of collision. (There are more than 30 classifications.) Compare intersections or segments with other similar ones to see if the crash rate is an anomaly. Take actions and conduct studies after-the-fact to measure their effectiveness.