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Traffic Analysis Model for Exit Ramp Congestion at Urban Freeway  

Jeon, Jae-Hyeon (서울시립대학교 교통공학과)
Kim, Young-Chan (서울시립대학교 교통공학과)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.9, no.3, 2010 , pp. 30-40 More about this Journal
Abstract
The freeway congestion is largely generated by a mainline spillover of the exit ramp queue. So it is necessary to study for modeling of the phenomenon and applying the model. In this study, the authors evaluated applicability of the Supply-Demand model, which can express traffic flow for the freeway by applying flexibly supply and demand curves for capacity of the freeway. First the authors proposed methods processing input data required in the Supply-Demand model, such as sending & receiving functions and time-varying capacity constraints for the freeway mainline. After modeling the Supply-Demand application model, the authors applied the model to the site including congested Hongeun exit ramp in Seoul Ring-road, and improved the model by adjusting application techniques and calibrating parameters. The result of the analysis showed that the Supply-Demand model yielded a queuing pattern and queue location similar to them observed in the field data, and applicability of the Supply-Demand model was varified.
Keywords
Supply-demand model; sending-receiving function; exit ramp queue; macroscopic flow model; newell's simplified flow-density model;
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Times Cited By KSCI : 1  (Citation Analysis)
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