山区公路平曲线半径值与行车速度之间的关系研究

通过选取山区某三级公路的某一路段为研究对象,该路段内含有不同半径大小的平曲线。采用动态GPS仪,现场测试车辆行驶的动态速度,并与路段内各种平曲线半径相对照,收集不同半径曲线段的线形资料及速度数据。通过对数据的分析整理,获得该三级公路平曲线半径与行车速度的回归模型,并利用运行速度理论分析该路段平曲线设计指标使用的恰当性和平曲线上实际行车状态的安全性。

Relationship Between Horizontal Curve Radius and Running Speed of Mountain Highway

A section of a tertiary highway in mountain area containing different sizes of the horizontal curve radius was selected as research object.The vehicles′ dynamic speeds were obtained at the scene through the dynamic field test by the dynamic GPS device.Contrasting with various horizontal curve radiuses in the section,the linear data and velocity data of different radius of the curve segment were collected.Then the regression model of radius of horizontal curve and running speed of the tertiary highway is obtained by analyzing the data.At last,the appropriateness of the selection of horizontal curve design indexes and the security of actual traffic condition were analyzed by the running speed theory.