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http://dx.doi.org/10.7470/jkst.2015.33.1.90

Analysis of Saturation Flow Rate on Interrupted Flow During Rainfall  

Kim, Bongseok (Nuclear Emergency Preparedness Team, Korea Atomic Energy Research Institute)
Roh, Chang-Gyun (Highway and Transportation Research Division, Korea Institute of Civil Engineering and Building Technology)
Son, Bongsoo (Department of Urban Engineering, Yonsei University)
Publication Information
Journal of Korean Society of Transportation / v.33, no.1, 2015 , pp. 90-99 More about this Journal
Abstract
The climate of Korea has clear rainy and dry season due to seasonal wind. In general, The rainy season in Korea is from early summer through to early fall. And precipitation accounted for more than half of the total annual rainfall in this period. This study is aiming to analysis of variation in saturation flow rate at signalized intersection during rainfall. The range of spatial is urban signalized intersections in Seoul and temporal is rainfall or ideal condition in daylight. Traffic data are collected through CCTV of Seoul Metropolitan Police Agency, and on-site video recordings directly. Weather condition data are collected from the Korea Meteorological Administration. In addition, the value of saturation headway and saturation flow rate, in rainfall condition, are derived through video frame analysis. As a results of analysis, decrease of saturation flow rate and increase of saturation headway during rainfall were confirmed by comparison with non-rainfall. The higher rainfall rate is, the more decreased saturation flow rate at the intersections. Rainfall rate is divided three area by the results of statistical test, and saturation flow rate decrease 7%, 17%, 21%, respectively.
Keywords
rainfall; rainfall effect adjustment factor; saturation flow rate; saturation headway; urban signalized intersection;
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