Vehicle Conversion Factors Based on the Analysis of Occupancy Time

Abstract

Abstract: Vehicle conversion factors are important parameter for capacity and service level of expressway. This paper analyzes the relation between occupancy time and vehicle conversion factors, and the calculating model of vehicle conversion factors based on the analysis of occupancy time is presented. Firstly, the traffic data need to be classified according to the vehicle speed and traffic composition, and two regression correlations among occupancy time, traffic density and traffic volume are developed. Secondly, the regression coefficients can be obtained through the practical data. Finally, vehicle conversion factors can be calculated through the differential and radio method. Data collected from Jing-Jin-Tang expressway shows that the presented approach can well reflect the difference of kinds of vehicles, and can be used to analyze the current situation of the specific traffic flow in China’s expressway.

Key words: vehicle conversion factors, occupancy time, capacity, expressway

摘要： 车辆折算系数是高速公路通行能力和服务水平研究的重要参数。在简要介绍国内外车辆折算系数计算方法的基础上，对时间占有率和车辆折算系数的关系进行分析，提出一种新的基于时间占有率的车辆折算系数计算模型。模型首先根据车辆速度和交通构成对交通检测数据进行分类，建立时间占有率、密度和交通量之间的相互关系模型；然后利用实测数据求得各模型的回归参数；进而采用微分比值的方法计算车辆折算系数。通过京津塘高速公路的数据验证，表明基于时间占有率分析的车辆折算系数能够反映车流中车型间的差异及相互影响，有助于特定交通流交通状况的分析。

关键词: 车辆折算系数, 时间占有率, 通行能力, 高速公路

CLC Number:

U491

AO Gu-chang, JIA Yuan-hua,ZHANG Hui-ling . Vehicle Conversion Factors Based on the Analysis of Occupancy Time[J]. Journal of Transportation Systems Engineering and Information Technology, 2008, 8(3): 106-110 .

敖谷昌,贾元华,张惠玲. 基于时间占有率分析的车辆折算系数研究[J]. 交通运输系统工程与信息, 2008, 8(3): 106-110 .

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URL: http://www.tseit.org.cn/EN/abstract/abstract17672.shtml

http://www.tseit.org.cn/EN/Y2008/V8/I3/106

References

[1] 任福田，刘小明，荣建等. 交通工程学[M]. 北京：人民交通出版社，2003.[REN Fu-tian, LIU Xiao-ming, RONG Jian. Traffic Engineering[M]. Beijing: China Communication Press,2003.]

[2] 高耀华，刘洪君，周荣责．基于高速公路通行能力分析的车辆折算系数理论与算法[J]．公路交通科技，2000，17 (6)：60－63.[GAO Yao-hua, LIU Hong-jin, ZHOU Rong-gui．Theory and arithmetic of standard vehicle equivalents for expressway capacity analysis[J]. Journal of Highway and Transportation Research and Development，2000，17 (6)：60－63.]

[3] 景鹏，孟祥海. 城市道路车辆分类及折算系数研究[J]. 城市交通，2006，4（2）：61－63.[JING Peng， MENG Xian-ghai. A study on vehicle classifications of urban road and their conversion factors[J]. Urban Transport of China，2006,4(2):61－63.]

[4] 中华人民共和国交通部. 公路工程技术标准(JTGB01－2003)[S]. 北京：人民交通出版社，2003.[Ministry of Communications of the People’s Republic of China. Technical standard of highway engineering(JTGB01—2003)[S]．Beijing：China Communications Press，2003.]

[5] 付强，林航飞，杨晓芳等. 基于服务水平的车辆折算系数[J]. 同济大学学报(自然科学版)，2007，35（1）：67—71.[FU Qiang，LIN Hang-fei，YANG Xiao-fang. Passenger car equivalence research out of level of service consideration[J]. Journal of Tongji University(Natural Science)，2007，35（1）：67—71.]

[6] 高海龙，周荣贵，王炜．当量车的动力学计算模型[J]．公路交通科技，2002，19 (5)：118－121.[GAO Hai-long, ZHOU Rong-gui，WANG Wei. Dynamic calculating model for passenger-car equivalents[J]. Journal of Highway and Transportation Research and Development，2002，19 (5)：118－121.]

[7] Huber M J．Estimation of passenger car equivalents of trucks in traffic stream [J]．US Transportation Research Board，Transportation Research Record,1982,869:60－70.

[8] 王进，唐忠华，陆化普. 车辆折算系数研究[J]. 土木工程学报，2004,37(12):97－102.[Wang Jin, Tang Zhonghua, Lu Huapu. Study of vehicle conversion coefficients[J]. China Civil Engineering Journal，2004,37(12):97-102.]

[9] Taylor M A P，Miller A J，Ogden K W．Aspects of traffic flow on grades[C]//．Proceedings 6th Australian Road Research Board Conference,1972,6(3):232-247．

[10] 石琴，黄志鹏，张卫华. 基于交通流元胞自动机模型的车辆当量换算[J].中国公路学报，2006，19（4）：114—117.[SHI Qin, HUANG Zhi-peng , ZHANG Wei-hua. Vehicle equivalent conversion of cellular automat model based on traffic flow[J]. China Journal of Highway and Transport,2006,19(4):114-117.]

[11] 陈宽民严宝杰. 道路通行能力分析[M]. 北京：人民交通出版社，2003.[CHEN Kuan-min, YAN Bao-jie. Road and Expressway Capacity Analysis[M]. Beijing: China Communication Press,2003.]

[12] 张亚平，张起森. 控制出入公路车辆折算系数研究[J]. 长沙交通学院学报，2000,16(1):58-62.[ZHANG Ya-ping，ZHANGQ Qi-sen. Research on passenger car equivalents for freeway and arterial highway[J]. Journal of Changsha Communications University，2000,16(1):58-62.]

[13] 常成利，周刚. 高速公路路段通行能力分析方法的探索与实践[J]. 公路交通科技，2003,20(2):68-72.[CHANG Cheng-li，ZHOU Gang. Research and practice of expressway section capacity analysis method[J]. Journal of Highway and Transportation Research and Development,2003,20(2):68-72.]

[14] 熊烈强，李杰. 车辆折算系数的分类及算法[J]. 公路交通科技，2005，22（7）：128－130.[XIONG Lie-qiang, LI Jie. Classification and calculation method of passenger car equivalent[J]. Journal of Highway and Transportation Research and Development，2005,22(7):128-130.]

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