1. School of Electronic Engineering, Xi'an Shiyou University, Xi'an Shaanxi, 710065, China;
2. School of Highway, Chang'an University, Xi'an Shaanxi 710064, China;
3. CCCC First Highway Consultants CO., LTD, Xi'an Shaanxi 710075, China;
4. School of Electrical and Control Engineering, Chang'an University, Xi'an Shaanxi 710064, China
Comparative Analysis of Parameter Evaluation Methods in Expressway Travel Time Reliability
CHEN Jiao-na1,2, Zhang Xiang3, ZHANG Sheng-rui2, JIN Yin-li4
1. School of Electronic Engineering, Xi'an Shiyou University, Xi'an Shaanxi, 710065, China;
2. School of Highway, Chang'an University, Xi'an Shaanxi 710064, China;
3. CCCC First Highway Consultants CO., LTD, Xi'an Shaanxi 710075, China;
4. School of Electrical and Control Engineering, Chang'an University, Xi'an Shaanxi 710064, China
摘要Different parameter results are produced using various methods with the same sample, which follows the lognormal distribution. Therefore, massive historical data of an expressway toll are collected to fit the lognormal distribution of the travel times of cars and trucks. Maximum likelihood estimation is compared with least squares estimation based on five indexes:the sum of squared errors (SSE), the SSE of the cumulative distribution function, the coefficient of determination, the relative error of the skewness coefficient, and the relative error of the kurtosis coefficient. Experimental results show that the maximum likelihood estimator is more efficient than the least squares estimator in fitting the cumulative probability distribution. The unit distance travel time reliability model for the section is established, and the parameter estimation method and the appropriate threshold are provided. Finally, the proposed model is validated using the Shaanxi expressway network in a case study. The results show that travel time reliability is affected by travel distance and departure time. In addition, departure time more significantly affects the travel delay of cars than that of trucks.
Abstract:Different parameter results are produced using various methods with the same sample, which follows the lognormal distribution. Therefore, massive historical data of an expressway toll are collected to fit the lognormal distribution of the travel times of cars and trucks. Maximum likelihood estimation is compared with least squares estimation based on five indexes:the sum of squared errors (SSE), the SSE of the cumulative distribution function, the coefficient of determination, the relative error of the skewness coefficient, and the relative error of the kurtosis coefficient. Experimental results show that the maximum likelihood estimator is more efficient than the least squares estimator in fitting the cumulative probability distribution. The unit distance travel time reliability model for the section is established, and the parameter estimation method and the appropriate threshold are provided. Finally, the proposed model is validated using the Shaanxi expressway network in a case study. The results show that travel time reliability is affected by travel distance and departure time. In addition, departure time more significantly affects the travel delay of cars than that of trucks.
基金资助:Supported by the Shaanxi Province Transportation Science and Technology Project(14-40X)
通讯作者:
CHEN Jiao-na
E-mail: chenjn@xsyu.edu.cn
引用本文:
陈娇娜, 张翔, 张生瑞, 靳引利. 高速公路行程时间可靠性模型参数估计方法比较分析[J]. Journal of Highway and Transportation Research and Development, 2017, 11(3): 93-99.
CHEN Jiao-na, Zhang Xiang, ZHANG Sheng-rui, JIN Yin-li. Comparative Analysis of Parameter Evaluation Methods in Expressway Travel Time Reliability. Journal of Highway and Transportation Research and Development, 2017, 11(3): 93-99.
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