城市快速路匝道合流区车速限制研究

Speed restriction on ramp merging area of urban expressway

为了明晰城市快速路匝道合流区交通运行最有利的车速限制策略,基于匝道合流区限速原则,采用快速路实测数据和数理统计分析方法,研究匝道车辆车速分布、流量与车速关系以及车道位置、车型和车道宽度对匝道合流区的合理限速值的影响.分析表明:车速随车道位置由内至外依次降低,车道宽度虽与车速呈正比,但影响并不大,车速主要受流量影响,与其呈正比.城市快速路匝道合流区与基本路段的车速特征差异较大,应分别制定限速策略,匝道合流区限速值应根据车道位置、车道宽度和流量情况综合进行考虑.

To clear the best limiting speed strategy in urban expressway ramp merging area,based on the principle of limiting speed on ramp merging area,the effects of speed distribution,relationship between volume and speed,speed distribution in various lane position,vehicle type and lane width on the appropriate speed of ramp vehicles were studied by actual measured data of expressway and mathematical statistics.The result shows that the speed from inside to outside is decreased,and mainly affected by the traffic flow.Traffic speed characteristics are different between ramp merging area and basic road section,and different speed limit strategy should be formulated,the value should be determined according to the location of lanes,lane width and traffic situation integrated.