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A Case Study on the Traffic Operational Guidance for Temporary Closure of Climbing Lane; Focusing on Nakdong JC at Jungbunaeryuk Expressway  

Choi, Yoon-Hyuk (한국도로공사 도로교통연구원)
Lee, Seung-Jun (한국도로공사 도로교통연구원)
Bae, Young-Seok (한국도로공사 ITS처)
Ko, Han-Geom (아주대학교 건설교통공학과)
Publication Information
International Journal of Highway Engineering / v.12, no.4, 2010 , pp. 17-28 More about this Journal
Abstract
A climbing lane is installed to separate low-speed traffic from high-speed traffic if drastic traffic capacity reduction is expected due to a large number of vehicles that slow down in the upward section. Existing studies on climbing lanes have focused on the designation, location of starting and ending points, and installation method of climbing lane with regard to road design standards. However, in terms of traffic operation, it was known that the climbing lanes cause traffic congestion due to the increase of traffic volumes. In this regard, this study aims to establish traffic operational guidance as to how much effects temporary closure of climbing lanes can have on traffic improvement according to the volume-capacity ratio, grade, and composition of trucks. A test section of simulated climbing lane was selected in Nakdong JC bound for Masan(136.9K~133.3K, 3.6km, 3.7%) on Jungbunaeryuk expressway to conduct VISSIM analyses, microscopic traffic simulation based on such control variables as traffic volume(v/c), grade and the trucks ratio. As a result of the analyses, it has been found that v/c and the ratio of trucks are the key variables for efficient traffic management of climbing lanes in order to relieve traffic congestion via climbing lane. If ratio of trucks are more than 50% and when v/c would be 0.8, both climbing lane would be closed and non-operated regardless of grade and ratio of trucks when v/c is 1.0. With the increased traffic due to a five-day work week system, continued peak hours during the weekday, increased and various patterns of congestion on expressway, this study would be expected to contribute to facilitating researches on flexible operational standards for road facilities.
Keywords
climbing lane; traffic congestion; traffic management; traffic operational guidance; case study;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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