Abstract India, a country with the highest number of road crashes and resulting injuries/deaths, has several issues associated with crash data for traditional safety analysis. For adequate and faster safety evaluation, traffic conflict technique using several proximal indicators is in practice worldwide. Among all indicators, Post-Encroachment Time (PET) is the most popular one for its easier measurement. However, accurate identification of critical conflicts based on PET threshold is still a gray area. For this purpose, four unsignalized intersections have been selected from the NCR India. This study is focused on identifying critical conflicts on the concept of perception-reaction time for emergency situations and adopted PET threshold of 1 s. This value of emergency perception-reaction is recommended by AASHTO (2001) for hazardous situations. Among various crossing situations, the maximum proportion of critical conflicts is found when through-moving vehicles are Two Wheelers (2W) followed by Light Commercial Vehicles (LCV). The appropriateness of the proposed method is verified by using 5 years’ crash data for right-turn right angle and right-turn head-on collisions and finding a statistically significant relationship between these right-turn-related crashes and critical crossing conflicts. This study can be utilized as an effective tool to evaluate the safety at various traffic facilities where the collection of detailed crash data is a serious issue.
Safety Assessment at Unsignalized Intersections Using Post-Encroachment Time’s Threshold—A Sustainable Solution for Developing Countries
2019-01-01
15 pages
Article/Chapter (Book)
Electronic Resource
English
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