高速公路主线同侧连续入口最小间距研究

Research on Minimum Distance of the Continuous Entrance on Highway Mainline at the Same Side

以高速公路互通式立交主线同侧连续合流形式为研究对象,通过对大小型车的加速特性进行分析,并基于可插入间隙理论,确定了不同匝道车道数车辆汇入主线的加速车道模型;然后通过分析驾驶员操作规律,考虑反应距离、决策距离、换道或减速距离3个方面的需求,建立了主线车辆与下游匝道汇入车辆间安全视距模型;最后确定以小型车为研究对象的加速车道长度值与换道模型确定的安全视距值之和,建立高速公路主线同侧连续入口最小间距计算模型,并提出了基于主线和匝道设计速度、入口匝道车道数的高速公路主线同侧连续入口最小间距指标值。研究成果是对我国有关规范和设计细则的完善和补充。

Taking highway interchange mainline continuous confluence form at the same side as the research object, through the analysis of the size of the car acceleration characteristics, and based on gap theory, the acceleration lane models of different number ramp with vehicle into the mainline are determined; then through the analysis of the driver operating rules, from 3 aspects of the reaction distance, decision distance, change lane or the deceleration distance, the mainline vehicle and the downstream ramp vehicle into main line safety distance models are established~ finally small cars as the research object of the acceleration lane length and change lane model to determine the safety distance, and the highway mainline continuous entrance at the same side minimum distance calculation model is established, based on mainline and ramp design speed, the number of entrance ramp highway mainline continuous entrance at the same side minimum distance index is put forward. The research results can serve as an improvement and supplement to relevant standards and design rules in China.