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http://dx.doi.org/10.7855/IJHE.2012.14.6.167

New Speed Adjustment Factor for Analyzing Level of Service at Multi-Lane Highway  

Kim, Wongil (연세대학교 스마트공간연구소)
Kang, Woneui (한국건설기술연구원 첨단교통연구실)
Noh, Chang-Gyun (연세대학교 스마트공간연구소)
Park, Bumjin (한국건설기술연구원 첨단교통연구실)
Publication Information
International Journal of Highway Engineering / v.14, no.6, 2012 , pp. 167-173 More about this Journal
Abstract
PURPOSES : This study is to develop speed correction factor for more realistic Level-of-Service(LOS) at multilane highway. METHODS : In this study, we compared speed difference the degree of speed reductions in actual multilane road conditions with speed reduction considering speed correction factor presented in highway capacity manual using statistical techniques. And also we presents new speed correction factor analyzing collected data at national highway No.1 (Goyang~Wolrung). RESULTS : The result of analyzing and comparing new suggested speed correction factor with speed correction factor in Korea Highway Capacity Manual (KHCM) shows RMSE (Root Mean Square Error) in new speed correction factor (RMSE 1.5) is much lower than existing speed correction factor (RMSE 13.4). New suggested speed correction can be used for analyzing Level-of-Service at multilane highway. And also we suggests improvements for analysis procedure in analyzing Level-of-Service at multilane highway CONCLUSIONS : As a result of comparing differences, we draw the causes that effect the differences in speed and suggest new speed correction factor that consider traffic volumes. It can be more rational because it uses speed correction factor which can consider more realistic traffic conditions, etc.
Keywords
multilane highway; speed adjustment factor; average travel speed; highway capacity manual; statistical analysis;
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  • Reference
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