青藏高原双车道公路限速对运行效率的影响

发布时间：2018-05-08 03:22

本文选题：交通工程 + 青藏高原　；参考：《重庆交通大学学报(自然科学版)》2017年12期

【摘要】：通过对青藏高原双车道公路车辆运行速度、车辆组成、道路线形、海拔氧含量以及现状限速组合方式的调查,考虑将限速导致的控制延误作为衡量高原公路运行效率的指标,应用SPSS统计学分析软件,采用多元线性回归的方法,分别建立了高原地区双车道公路大、小车限制速度—速度均值模型和速度均值—运行速度模型,最终得到了限制速度对运行效率-延误互动关系模型。结果表明:大小车的限速值、道路纵坡坡度、路段长度和道路的设计速度都对道路系统行驶车辆的运行效率产生影响,而不同的是不同的道路等级、道路上小车所占车辆的比例这些因素会对小车的运行效率产生一定的影响,而对大车的影响不大,另外随着海拔的增加,大、小车的运行效率逐渐降低,且大车所产生的延误比小车要高。
[Abstract]:By investigating the running speed, vehicle composition, road alignment, altitude oxygen content and current speed limit combination of two-lane highway vehicles in the Qinghai-Tibet Plateau, the control delay caused by the speed limit is considered as an index to measure the running efficiency of the plateau highway. By using the SPSS software and the multiple linear regression method, the models of the mean speed and speed of the two lane highway in the plateau area are established, respectively, and the model of the mean speed and the mean speed of the vehicle are established respectively. Finally, the model of the interaction between limited speed and operation efficiency-delay is obtained. The results show that the speed limit of the vehicle, the slope of the longitudinal slope of the road, the length of the road and the design speed of the road all affect the running efficiency of the vehicle in the road system, but the different grade of the road is different. The proportion of vehicles on the road these factors will have a certain impact on the running efficiency of small cars, but not on the large cars. In addition, with the increase of altitude, the running efficiency of small cars will gradually decrease. And the delay caused by the car is higher than the car.
【作者单位】：北京工业大学交通工程北京市重点实验室;
【基金】：国家科技支撑计划课题(2014BA05B00)
【分类号】：U491

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