山区公路平曲线运行速度预测模型研究

Models for Predicting Operation Speeds on the Montanic Highway Horizontal Curve Section

利用装载高精度激光测速仪、转角测试仪、GPS的试验车,以山区低等级公路平曲线段小客车运行速度为研究目标,采集山区公路平曲线段数据,通过对国内外平曲线运行速度预测方法研究,结合山区公路的特点,给出了山区公路运行速度预测模型,并结合实际数据进行模型参数标定,为山区公路安全性评价提供依据,在318国道安全性评价中,该模型模拟的曲线运行速度与实际观测拟合较好。

Atestingvehicle, loaded the equipment of high-accuracy laser speedometer corner tester and GPS, is utilized in montanic highway with low grade. The operation speed of a minibus in the road section of horizontal curve is taken as a target in the research, and aseriesofdataisgatheredwiththe testing vehicle on the curve. By studying of the methods, in home and abroad, for speed prediction for a two-lane montanic horizontal curve road section, and considering the characteristic of the montanic highway, a model predicting the operation speeds on a two-way montanic highway horizontal curve section is presented in the paper, and the model parameters are set up referring to the test data. The work provides a basis for the montanic highway safety eualution. In 318th national highway＇ s safety estimation, the model has a nice fitting to the curve of actual speeds.