Optimization of Combined Horizontal and Vertical Curves Design of Mountain Road Based on Vehicle-Road Coordination Model

2019 5th International Conference on Transportation Information and Safety (ICTIS) Pub Date : 2019-07-01 DOI:10.1109/ICTIS.2019.8883680

Yuchuan Du, Lei Yue, Shuo Liu

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引用次数: 3

Abstract

Through the analysis of driving stability of the vehicle on combined horizontal and vertical curves (CHVC), the safety model based on vehicle-road coordination was established with the critical state of accident as the limited condition. The influence of various factors on the design parameters such as the minimum radius and the maximum slope length were discussed. The safety model showed that the minimum radius of CHVC was proportional to the driving speed and road gradient, but inversely proportional to the value of the superelevation and crosswise affixing coefficient. Besides, the maximum slope length of CHVC was proportional to the road rolling resistance coefficient and slip ratio, but it was inversely proportional to driving speed, road gradient, and vehicle type. Furthermore, the maximum slope length was less affected by the superelevation. In addition, in order to improve the safety level of mountainous roads, this paper discussed the threshold value of the design index of CHVC considering the actual operating speed of the vehicle.

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基于车路协调模型的山地公路横、纵组合曲线优化设计

通过对车辆在水平和垂直组合曲线上的行驶稳定性分析，以事故临界状态为限制条件，建立了基于车路协调的安全模型。讨论了各种因素对最小半径、最大坡长等设计参数的影响。安全模型表明，CHVC最小半径与行车速度和坡度成正比，与超高程系数和横向附着系数成反比。CHVC最大坡长与路面滚动阻力系数、滑移率成正比，与车速、路面坡度、车辆类型成反比。此外，最大坡长受超高标高的影响较小。此外，为了提高山区道路的安全水平，本文结合车辆的实际行驶速度，对CHVC设计指标的阈值进行了探讨。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 5th International Conference on Transportation Information and Safety (ICTIS)

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