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Development of Saturation Flow Rate Estimation Models Considering Workzone in the Vicinity of Signalized Intersections  

Eo, Hyo-Gyeong (한국건설기술연구원 첨단교통연구실)
Sin, Chi-Hyeon (경기대학교 도시.교통공학과)
Publication Information
Journal of Korean Society of Transportation / v.28, no.6, 2010 , pp. 109-120 More about this Journal
Abstract
This study aims to develop mathematical models for estimating saturation flow rates at the stop line of signalized intersection due to Workzones in the vicinity, since the saturation flow rate is the most critical parameter in capacity analysis for signalized intersections. It was found by reference review that saturation flow rates are sensitively influenced by the location of Workzone, the number of lanes, cycle length and effective green time. Extensive microscopic simulation runs were also performed and compared to the those of mathematical models for model verification. Mathematical models were developed based on traffic flow theory and dualizing them by the location of workzones. And then each result produced by changing important parameter values was carefully examined and analyzed. Small but consistent differences in saturation flow rate values between mathematical models and simulations exist. However, the pattern of changes in saturation flow rates depending on each variable was similar.
Keywords
Urban area; Signalized Intersection; Workzone; Saturation Flow Rate; Mathematical model;
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