路线设计中车辆行驶速度预测模型

在初定路线技术指标的条件下 ,综合考虑平面、纵断面和横断面三方面的影响 ,建立了行驶速度预测模型 ,用于检验、评价和控制技术指标和线形设计 ,达到线形协调和运行安全的目的。在纵断面预测中提出极限功率法的思路 ,在平面预测中引入了曲度 -路面宽度 -速度的方法。通过路段试验 ,实现了检验、评价线形设计的作用。

Prediction model of vehicle speed for highway route design

When route technical indexes firstly determined,the prediction model of vehicle speed was established to check,evaluate and control alignment design,in this model three influences of horizontal curve,profile and cross section considered.The limited power method was brought about in predicting operating speed on the profile.The curvature pavement width operating speed method was adopted in predicting operating speed on the horizontal section.The testing results show that this model has a good performance.