互通立交入口匝道大型车加速特性研究  

Analysis of Acceleration features of commercial vehicles for ramps entrances of interchange

作　　者：张亚坤 李敏 杨碧琦 Zhang Yakun;Li Min;Yang Biqi(Chang'an University School of Automobile,Shaanxi Xi’an 710064)

机构地区：[1]长安大学汽车学院交通运输系,陕西西安710064

出　　处：《汽车实用技术》2020年第22期214-217,共4页Automobile Applied Technology

摘　　要：目前大型车存在高速公路互通立交入口加速汇入道路主线困难的情况,导致互通立交入口交通事故日益增加。通过对互通立交合流影响区车辆运行特性调查,基于修正的二阶Erlang车头时距分布模型,建立大型车安全汇入主线的加速车道长度模型;探究大型车比功率、坡度与加速段长度的关系;推导出符合我国互通立交车辆运行状况的加速车道长度推荐值。研究发现:车辆的比功率越小,随着坡度增大,车辆需要越长的匝道加速车道长度。该研究可以为高速公路互通立交针对大型车方面的加速车道长度相关标准和规范的修订提供参考。At present,large vehicles have difficulties in accelerating the merge of highway interchanges into the main line of the road,resulting in an increasing number of traffic accidents at interchange entrances.By investigating the vehicle operating characteristics in the area affected by the interchange,based on the revised second-order Erlang headway time distribution model,an acceleration lane length model for large vehicles safely entering the main line is established;explore the relationship between specific vehicle power,slope and the length of the acceleration section;Deducing the recommended value of the acceleration lane length that meets the operating conditions of interchange vehicles in China.The study found that the smaller the specific power of the vehicle,the longer the ramp that the vehicle needs to accelerate the lane length as the slope increases.The research can provide a reference for the revision of standards and specifications related to the acceleration lane length of large vehicles on the interchange of expressways.

关 键 词：大型车 互通立交 加速车道长度 比功率 坡度 

分 类 号：U467[机械工程—车辆工程]