Post encroachment time threshold identification for right-turn related crashes at unsignalized intersections on intercity highways under mixed traffic.

Post encroachment time threshold identification for right-turn related crashes at unsignalized intersections on intercity highways under mixed traffic. Int J Inj Contr Saf Promot. 2019 Sep 25;:1-15 Authors: Paul M, Ghosh I Abstract Unsignalized intersections in developing countries experience many serious conflicts between cross-traffic due to indiscipline traffic manoeuvrability. Historically, Post Encroachment Time (PET) has gained attention as a proximal indicator to analyze crossing conflicts. However, identifying an appropriate PET threshold to classify critical conflicts for highly heterogeneous traffic scenario is still an unexplored area. Consequently, this study proposes a novel approach of PET threshold identification with proof of application by collecting data from ten intersections located on four-lane intercity highways in the National Capital Region (NCR), India. Both crossing conflicts and right-turn related crash data (for the left-hand drive) are collected. Their correlations are thoroughly studied for each PET threshold using a quantitative technique considering all and individual vehicle categories. Finally, a qualitative analysis is done by ranking the sites based on cumulative PET and related crashes to verify the proposed quantitative technique. A PET threshold of 1 s is obtained from both the techniques which can be used to identify critical conflicts for unsignalized intersections located on four-lane inter...
Source: International Journal of Injury Control and Safety Promotion - Category: Accident Prevention Tags: Int J Inj Contr Saf Promot Source Type: research