基于服务水平的高速公路改扩建施工区限速方法研究

Research on Speed Limit Method of Expressway Reconstruction and Expansion Construction Area Based on Service Level

摘要:

为克服高速公路改扩建施工区限速方法考虑因素单一、服务水平不全面的缺陷，提出了基于服务水平的高速公路改扩建施工区限速方法，该方法从服务水平的角度考虑效率性、安全性、舒适性选取车辆平均行程延误、平均车头间距、速度标准差作为评价指标，通过VISSIM仿真，以熵权—优劣解距离法建立了高速公路改扩建施工区限速评价模型，确定了高速公路改扩建施工区最优限速。以柳南高速为实例，计算结果表明：各饱和度0.75、0.8、0.85、0.9对应最优限速分别为80、60、60、60 km/h，服务水平均高于其他限速方案。可见考虑服务水平的改扩建施工区限速方法结果更优，有利于提升高速公路改扩建施工区服务水平。

Abstract:

In order to overcome the defects of the speed limit method in the construction area of expressway reconstruction and expansion, such as single consideration factors and incomplete service levels, the speed limit method in the construction area of expressway reconstruction and expansion based on the service level is proposed. From the perspective of service level, the efficiency, safety and comfort are considered, and the average vehicle travel delay, average headway and standard deviation of speed are selected as the evaluation indicators. Through VISSIM, the evaluation model of speed limit in construction area of expressway reconstruction and expansion is established by Entropy weight - Method of distance between superior and inferior solutions to determine the optimal speed limit in the construction area of expressway reconstruction and expansion. Taking Liunan Expressway as an example, the calculation results show that the optimal speed limits corresponding to each saturation (0.75, 0.8, 0.85 and 0.9) are 80, 60, 60， 60 km/h respectively. The level of service is better than that of other speed limit schemes. It can be seen that the speed limit method for the reconstruction and expansion construction area considering the service level has better result. And it is conducive to improving the service level of the construction area for the reconstruction and expansion of expressways.