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http://dx.doi.org/10.7855/IJHE.2011.13.3.195

Estimation of Capacity at Two-Lane Freeway Work Zone Using Traffic Flow Models of Each Vehicle-Type  

Park, Yong-Jin (계명대학교 교통공학과)
Kim, Jong-Sik (한국건설기술연구원)
Publication Information
International Journal of Highway Engineering / v.13, no.3, 2011 , pp. 195-202 More about this Journal
Abstract
The purpose of this study is to estimate the capacity of two-lane freeway work zone blocking one lane using traffic flow models of each vehicle-type. Firstly, three traffic flow models of three different vehicle-types were developed using the data collected from each at the beginning and the ending point of the work zone. For each model, the maximum flow rate of three vehicle-types were calculated respectively. Maximum flow rate at the work zone was recalculated using passenger car equivalent value and percentage of vehicle-type. Secondly, traffic flow model using passenger car equivalent volume data was developed using the data collected from each at the beginning and the ending point of the work zone. Maximum flow rate for the work zone was calculated along. Two values of maximum flow rates through the work zone were compared and evaluated as the capacity of the work zone. This study found that the maximum flow rate of the work zone at the beginning point was less than that at the ending point because of impedance such as lane changing behaviors before entering the work zone. The capacity of two-lane freeway work zone blocking one lane was estimated 1,800pcphpl.
Keywords
capacity; work zone; traffic flow model; vehicle-type;
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