高速公路主线侧连续出口最小间距研究

摘要

以高速公路主线侧连续出口最小间距为研究对象,通过分析驾驶员认读标志的特点,高速公路车头时距的分布规律以及换道模型特征,建立主线侧连续出口匝道最小间距模型,提出基于车道数及设计速度的高速公路主线侧连续出口匝道最小间距的建议值.该建议值比规定值稍大,有利于提高高速公路行驶车辆的出口正确率和保证高速公路的通行能力,降低高速公路出口事故率.对我国现阶段高速公路连续出口匝道的设置提供了参考,且得出高速公路主线侧连续出口最小间距与车道数有关的结论.%Taking the highway line side continuous export minimum distance as the research object,this paper es-tabilished the main line side exit ramp straight minimum distance model,on the basis of the characteristics of the driver reading mark,the highway time headway distribution rule and the characteristics of lane changing model. The suggestive values of minimum distance were then obtained based on the lane number and designed speed of ex-pressway mainline side exit ramp.The proposal is a little bigger than the specified value,which is beneficial to in-crease the export accuracy of highway vehicles and guarantee of the highway traffic capacity,reduce highway acci-dent rate.The result provides reference to the settings of the highway exit-ramp in our country,and it concluded that the minimum distance of the highway line-side continuous export is relevant to the number of the lanes.