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http://dx.doi.org/10.12815/kits.2018.17.6.133

A Study on Real Time Signal Metering Operation at Roundabouts by Considering Queue Clearance Time  

Lee, Sol (Dept. of Civil and Environmental Engineering, Kongju National University)
Ahn, Woo-Young (Dept. of Civil and Environmental Engineering, Kongju National University)
Lee, Seonha (Dept. of Civil and Environmental Engineering, Kongju National University)
Cho, Han-Seon (Dept. of Road Transport Research, The Korea Transport Institute)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.17, no.6, 2018 , pp. 133-143 More about this Journal
Abstract
Roundabouts are generally installed at which traffic and pedestrian volume is relatively small intersections, and hence traffic can flow one direction around a circular island without traffic lights. A number of researches for roundabout signal metering have been processing ways to deal with operation efficiency drops in conditions of unusual traffic and pedestrian volume increases. However, there is still a shortcoming exists in previous operation algorithm does not consider the hidden vehicles between yield lines and detectors and queueing vehicles in circular lanes. These queueing vehicles between them can be cleared by introducing the queue clearance time. The purpose of this research is developing a real time signal metering operation algorithm by considering the vehicle queue clearance time. The results of varying queue clearance time application show that there is a substantial average vehicle delay reduction in VISSIM Com-Interface simulation. When the total number of entering vehicle is 3,200~4,800 vehicle/hour with varying queue clearance time application 21~50 seconds gives average delay reduction per vehicle by 16.1~71.7%.
Keywords
Roundabouts; Circular Island; Signal Metering; Queue Clearance Time;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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