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.
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)
出处
《汽车实用技术》
2020年第22期214-217,共4页
Automobile Applied Technology
关键词
大型车
互通立交
加速车道长度
比功率
坡度
Large vehicle
Interchange
The length of acceleration lane
Power-to-weight ratio
Slope
