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http://dx.doi.org/10.12652/Ksce.2010.30.3D.215

Predicting Average Speed within the Enterance and Exit Ramp Junction Areas of Urban Freeway  

Kim, Tae Gon (한국해양대학교 토목공학과)
Kwon, Mi Hyeon (한국해양대학교 토목환경공학과)
Ji, Seung Keun (한국해양대학교 토목환경공학과)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.30, no.3D, 2010 , pp. 215-222 More about this Journal
Abstract
Average speed denotes a travel speed based on the average travel time of vehicles to traverse a segment of roadway, and average travel speed is used as a measure of effectiveness (MOE) suggested in the highway capacity manual (HCM) for evaluating the level of service (LOS) of roadway. Most of the urban freeways in our country are having congestion problem regardless of the rush hours as a high-speed highway with a speed limit of 80km/h or less. Especially traffic congestion within the ramp junction areas is becoming worse by the increased traffic and lack of links with the arterials around the urban freeway. So, the purpose in this study is to identify the traffic characteristics within the ramp junction areas of urban freeway, predict the average speed within the ramp junction areas based on the traffic characteristics identified, and finally prove the validity of the average speed predicted.
Keywords
urban freeway; average speed; ramps; ramp junction area; prediction;
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