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《Highway》 2004-12
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A Study on Speed Characteristics of Traffic Stream in Express Roads

ZHONG Lian-de 1, RONG Jian 1, ZHOU Rong-gui 2, ZHANG Zhi-yong 1(1.Road and Transportation Lab., Beijing University of Technology, Beijing 100022, China;2.Research Institute of Highway, MOC, Beijing 100088, China)  
The general distribution characteristics of speed in express roads and speed characteristics under different volume are analyzed. The results indicate that the whole speed distribution doesnt obey normal distribution or lognormal distribution, but the speed under different volumes obeys different distributions. On the analysis of field data, it is concluded that the scattering of speed makes a difference in capacity.
【Fund】: 国家“十五”重点科技攻关项目 ( 2 0 0 2 BA40 4A0 2 );; 北京市自然科学基金 ( KD0 40 2 2 0 0 3 89)资助
【CateGory Index】: U491.112
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