DocumentCode :
2946037
Title :
Traffic Speed-Flow Model for the Mix Traffic Flow on Beijing Urban Expressway
Author :
Li, Yue ; Lu, Huapu ; Bian, Changzhi ; Sui, Ya Gang
Author_Institution :
Inst. of Transp., Tsinghua Univ., Beijing, China
Volume :
3
fYear :
2009
fDate :
11-12 April 2009
Firstpage :
641
Lastpage :
644
Abstract :
In order to explore the speed-flow relationship under complicated roadway characteristics and heavy traffic volume, this paper established a new practical model based on one month serial data collected from loop detectors on different sites of the expressway in Beijing. Different from the traditional model, the relationship formulated here is composed by free flow segment, stable flow segment and congested-evacuation segment. We start with a comprehensive review on classical speed-flow models. The limitation of general used model when analyzing the mixed traffic flow is pointed out. Then a cluster of new speed-flow models are established considering the site characteristics expressed with the distance from the bottleneck which appears at the entrance or exit ramp. Actual observed data shows fundamental parameters of speed-flow relationship model of urban expressway are affected by the entrance or exit ramp.
Keywords :
pattern clustering; road traffic; Beijing urban expressway; congested-evacuation segment; free flow segment; mix traffic flow; model clusters; stable flow segment; traffic speed-flow model; Curve fitting; Detectors; Fluid flow measurement; Mathematical model; Mechatronics; Road transportation; Scattering; Traffic control; Velocity measurement; Volume measurement; Speed flow relationship; curve; model; urban expressway;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Measuring Technology and Mechatronics Automation, 2009. ICMTMA '09. International Conference on
Conference_Location :
Zhangjiajie, Hunan
Print_ISBN :
978-0-7695-3583-8
Type :
conf
DOI :
10.1109/ICMTMA.2009.312
Filename :
5203286
Link To Document :
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