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选取典型山区高速公路连续长下坡路段作为研究对象,系统分析山区高速公路连续长下坡路段运行速度特征。采集长下坡路段特征断面分车型、分车道运行速度数据,以85%位运行速度作为断面车速代表,利用数理统计方法,在车辆运行速度特征统计的基础上,进一步研究了连续长下坡路段大货车和小客车运行车速与平纵组合设计指标的定量关系,以分析设计指标对运行速度的影响。
This paper chooses typical long distance sections of mountainous expressway as the research object and systematically analyzes the characteristics of running speed of continuous long downhill section of mountainous expressway. The data of characteristic sections of long downhill sections were collected and analyzed with the running speed of sub-lanes at 85% of the operating speed as the representative of section speed. Based on the statistic of the running speed of the vehicles, further study was conducted on the long- And small passenger car running speed and vertical and horizontal combination of design indicators quantitative relationship between the design indicators to analyze the impact on speed.