高速公路特长纵坡路段车辆的折算系数

Car conversion coefficient at large longitudinal slope section of highway

通过对特长纵坡路段汽车动力性能与运行速度的关系以及这些因素对通行能力的影响进行分析,提出了以速度为直接因素计算高速公路特长纵坡路段车辆折算系数的方法.基于运行速度预测模型,以各车型的运行速度和各车型的百分比为控制因素,得到了不同坡度、不同坡长、不同货车百分比时各类货车的折算系数,为特长纵坡路段的通行能力计算提供了依据.

Through the analysis of the relationship between vehicle dynamic performance at large longitudinal slope section and operating speed, and the analysis of the impact of these factors on traffic capacity, the car conversion coefficient method based on the vehi- cle speed is proposed,as the direct factor,at large longitudinal slope section of highway. Based on the operating speed prediction model ,the operating speed and the percentage of each type of vehicle which are the control factor, different truck types of car conversion coefficient at different longitudinal gradient, different grade length and different truck proportion is obtained, which provides the basis for calculating traffic capacity of large longitudinal slope section.