基于公路线形与运行速度一致性的速度控制方法

Speed Control Method based on Compliance of Operating Speed and Highway Alignment

为了在公路管理中制定系统科学的速度控制方案,提高公路交通安全性和通行效率,基于公路几何指标的安全性验证和沿线运行速度协调一致性评价,对既有公路的交通特征、交通安全现状、公路线形条件等因素进行分析,利用公路运行速度预测模型,采用筛选、迭代分析法优化公路沿线路段的限速值,得到最优的速度控制方案,并在深外环高速公路等实际工程中得以应用。研究结果表明:以公路实际交通状况为依据,通过评价检验公路沿线几何指标和行驶速度,采取控制行驶速度(满足限速值)或提供与公路行驶条件相适应的有效处置措施,保证了车辆行驶速度的连续和协调,可以最大程度地保障车辆行驶安全性,同时优化提升了以设计速度进行限速的传统模式。

In the paper the reasonable speed limit value of highway management is studied to develop the method of speed control scheme by analyzing the existing highway traffic characteristic, current road safety, highway alignment conditions and other factors. To ensure the road traffic safety, safety verification is conducted based on the highway geometric indices and highway operating speed consistency evaluation. By using the operating speed prediction model and iterative analysis, the best speed control scheme is determined. The method has been applied in project practice such as Shenzhen out- ring highway. The results show that： based on real highway traffic conditions, through the evaluation index inspection along the highway geometry and speed, by means of controlling the speed limit values （to meet the speed limit value） or providing effective measures adapted to highway conditions, the continuous and coordinate of vehicle operating speed can be guaranteed which can maximize the highway traffic safety.