互通立交入口匝道大型车加速车道长度研究  

Research on Length of Acceleration Lane for Large Vehicles on On-ramp of Interchange

作　　者：李敏 苏莉晓 李纳纳 陈婷婷 LI Min;SU Lixiao;LI Nana;CHEN Tingting

机构地区：[1]山东省公路设计咨询有限公司,山东济南250102

出　　处：《城市道桥与防洪》2024年第1期58-61,69,M0007,共6页Urban Roads Bridges & Flood Control

摘　　要：加速车道长度设计是否合理对车辆运行安全至关重要。为提高互通立交入口匝道加速车道长度设计的合理性及车辆运行的安全性,通过分析合流影响区车辆交通特性,基于修正的二阶爱尔朗车头时距分布模型,建立大型车在不同坡度(-2%≤i≤2%)、不同比功率(8~12 kW/t)下的加速车道长度计算模型,重点研究大型车在不同坡度、不同比功率下的加速车道长度。研究发现:坡度、比功率与加速车道长度均成正比。该研究可以为针对大型车的高速公路互通立交加速车道长度相关规范的修订提供参考。Whether the design of the acceleration lane length is reasonable is very important to the safety of vehicle operation.In order to improve the rationality of the acceleration lane length design on the on-ramp of interchange and the safety of the vehicle operation,by analyzing the traffic characteristics of the vehicles in the merge influence area,based on the modified second-order Erlang time headway distribution model,the calculation model of acceleration lane length for the large vehicles at different slopes(-2%≤i≤2%)and different specific powers(8~12 kW/t)is built to study the length of acceleration lane for the large vehicles under the different slopes and different specific powers.The research shows that the slope,the specific power and the length of the acceleration lane are all proportional,which can provide a reference for the revision of the relative specifications on the length of the acceleration lane at expressway interchanges for large vehicles.

关 键 词：大型车 互通立交 加速车道长度 坡度 比功率 

分 类 号：U412.35[交通运输工程—道路与铁道工程]