Citation

Salman NK, Al-Maita KJ. Transp. Res. Rec. 1995; 1485: 177-185.

Copyright

(Copyright © 1995, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

The FHWA procedure detailed in "Traffic Conflict Techniques for Safety and Operations" was used to collect data on conflicts at 18 three-leg, unsignalized intersections. The objectives were to identify the average and abnormal conflict rates at three-leg, unsignalized intersections in the city of Amman, Jordan, and to relate traffic conflicts to traffic volumes and accidents. The average and abnormal limits can be used to evaluate comparable three-leg, unsignalized intersections by the traffic conflict technique. A risk index was developed on the basis of various conflict types and related accidents to priority rank the intersections for adopting countermeasures. The study found that the predominant conflict type was the left-turn, same-direction conflict. Multiple regression technique was applied between different conflict types and combinations of traffic flows generating those conflicts at various intersection categories. Most of the predicted relationships indicated that traffic conflicts are dependent on different combinations of the generating flows. In addition, multiple regression technique was applied to relate accidents to traffic conflicts. The results revealed that accidents and conflicts are related by a linear relationship.

Record URL:
http://onlinepubs.trb.org/Onlinepubs/trr/1995/1485/1485-023.pdf

Language: en

Keywords

Accident prevention; Data acquisition; Highway accidents; Intersections; Regression analysis; Risk assessment; Highway traffic control; Motor transportation; Highway administration