Citation

Shariat-Mohaymany A, Kashani AT, Nosrati H, Kazemzadehazad S. J. Transp. Saf. Secur. 2013; 5(4): 273-284.

Copyright

(Copyright © 2013, Southeastern Transportation Center, and Beijing Jiaotong University, Publisher Informa - Taylor and Francis Group)

DOI

10.1080/19439962.2013.766290

PMID

unavailable

Abstract

The objective of this study is to develop a head-on conflict model through analyzing the influence of significant factors associated with head-on conflicts of two-lane rural roads in Iran, resulting from dangerous overtaking maneuvers. The effect of geometric, traffic, and environmental factors were investigated by applying traffic-conflict technique to 12 two-lane rural roads. Traffic data were collected via the inductive loop detectors installed on the roads and geometric parameters were obtained through field observations. The independent variables were percent of time spent following (PTSF), percentage of heavy vehicles, directional distribution of traffic (DDT), mean speed, speed standard deviation, type of section, surface width, longitudinal slope, type of day and lighting condition. A logistic regression model was developed, and the results showed that the increase in PTSF, surface width, longitudinal slope (1.5%-3%) and the decrease in mean speed and DDT are the main factors that increase the risk of traffic conflicts. In addition, it was found that most of traffic conflicts take place more on curved sections, at night, and on workdays. The two variables standard deviation of speed and percentage of heavy vehicles had no significant effect on the conflicts occurrence.

Language: en