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An Analytical Procedure to Estimate Non-recurrent Congestion caused by Freeway Accidents  

Jeong, Yeon-Sik (한국교통연구원)
Jo, Han-Seon (한국교통연구원)
Kim, Ju-Yeong (한국교통연구원)
Publication Information
Journal of Korean Society of Transportation / v.28, no.2, 2010 , pp. 45-52 More about this Journal
Abstract
The objective of this paper is to develop and apply a method that estimates the amount of traffic congestion (vehicle hours of delay) caused by traffic accidents that occur on freeways in Korea. A key feature of this research is the development of a method to separate the non- recurrent delay from any recurrent delay that is present on the road at the time and place of a reported accident. The main idea to separate these two delays is to use the speed difference between speed under accident condition and speed under normal flow condition. For the case study application, two datasets were combined to accomplish the objective of the study: (1) accident data and (2) traffic flow data. Eventually, the results can be useful for the performance evaluation of accident reduction program, for strategic plans to cope with congestion caused by traffic accidents, and for rectification of the estimation method for traffic congestion costs.
Keywords
Freeway; Traffic Accident; Traffic Congestion; Recurrent Congestion; Non-recurrent Congestion; Total Delay;
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