基于行驶轨迹的道路平面线形研究之直线篇

Study of Straight Line in Road Plane Alignment Based on Running Track

道路是车辆通行的载体,道路平面线形拟合车辆行驶轨迹的程度高低,体现了车辆通行条件的优劣。基于车辆的行驶轨迹,考虑人、车、路、环境等因素,探讨了车辆在直线、圆曲线、缓和曲线上行驶时的理论公式,在满足车辆安全、舒适的行驶条件下,测算了最大长直线、圆曲线最小半径及最大半径、最短缓和曲线等数据,为路线规范的修订提供参考。结合标准、规范,理论联系实践地探讨了直线、圆曲线、缓和曲线,有利于设计人员对道路线形设计的理解,有利于设计人员确定特定车辆的通行条件。

The road is the traffic carrier of vehicle. The road plane alignment fitting the level of vehicle running track will reflect the vehicle traffic condition. Based on the running track of vehicle, the factors of people, vehicle, road and environment are considered. The article discusses the theoretical formula of vehicle running on the straight line, circular curve and easement curve. Under the condition of satisfying the running safety and comfort of vehicle, the data of the maximum straight line, the minimum radius and the maximum radius of circular curve, and the shortest easement curve are measured and calculated so as to provide the reference for the revise of the route specifications. According to the standards and specifications, the article theoretically and practically discusses the straight line, circular curve and easement curve, which help the designers understand of the road alignment design and determination of specified vehicle traffic condition.