Citation

Glauz WD, Bauer KM, Migletz DJ. Transp. Res. Rec. 1985; 1026: 1-12.

Copyright

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

DOI

unavailable

PMID

unavailable

Abstract

The purpose of this research was to establish relationships between traffic conflicts and accidents and to identify expected and abnormal conflict rates given various circumstances. The data on which the conclusions and recommendations are based were collected during the summer of 1982 at 46 signalized and unsignalized intersections in the greater Kansas City area. The conclusions are limited to daytime (7:00 a.m. to 6:00 p.m.) and weekday (Monday-Thursday) traffic and to dry pavement conditions. Accident/conflict ratios have been statistically determined for several types of collisions for each of the four types of intersections (signalized high volume, signalized medium volume, unsignalized meduim volume, and unsignalized low volume). These ratios can be applied to comparable intersections to obtain an expected accident rate of a specific type after the appropriate conflict data are collected. Also, statistical procedures were developed to determine conflict rate values that could be considered abnormally high. Overall, traffic conflicts of certain types are good surrogates for accidents in that they produce estimates of average accident rates nearly as accurate, and just as precise, as those produced from historical accident data. Therefore, if there are insufficient accident data to produce an estimate, a conflicts study should be helpful.

Language: en

Keywords

ROADS AND STREETS - Intersections; TRANSPORTATION; HIGHWAY ACCIDENTS; STREET TRAFFIC CONTROL - Research