车道功能变更下的环形交叉口交通组织优化  

Optimization of traffic organization of roundabouts under lane function change

作　　者：韩霜[1] 黄于峻 HAN Shuang;HUANG Yujun(Faculty of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学土木与交通工程学院,广州510006

出　　处：《交通科技与经济》2025年第1期8-14,共7页Technology & Economy in Areas of Communications

基　　金：国家自然科学基金项目(71801052)。

摘　　要：为减轻环形交叉口交通拥堵及环境污染,提出一种将左转和直行车道与对向出口车道功能变更的交通组织方法。在上游交叉口信号控制下,引导左转和直行车辆沿中心线左侧车道进入环形交叉口,分别行驶1/4圈和1/2圈通过环岛。建立交通流饱和加权函数,对最大通行能力和最小平均排放进行加权,并建立区域信号协同优化模型,采用遗传算法求解。以四川某市环形交叉口为例进行实证研究,计算结果表明:该方案使区域总通行能力提升12.74%、平均排放下降9.11%;与传统环形交叉口信号控制方法相比,总通行能力增加22%,平均排放减少29.62%;且信号协同优化模型能在高饱和度下注重提高通行能力,反之,注重降低平均排放。To reduce traffic congestion and environmental pollution at roundabouts,a traffic organization method is proposed to change the functions of left-turn and through lanes along with opposing exit lanes.Under signal control at upstream intersections,left-turn and through vehicles are guided into the roundabout along the left side of the centerline,traveling 1/4 and 1/2 of the circle respectively to pass through.A traffic flow saturation weighting function is established to balance maximum traffic capacity and minimum average emissions.Based on this,a regional signal coordination optimization model is developed and solved using a genetic algorithm.An empirical study uses a roundabout in a city in Sichuan as an example.The results show that the proposed scheme increases regional total traffic capacity by 12.74%and reduces average emissions by 9.11%.Compared with traditional roundabout signal control methods,the total traffic capacity increases by 22%,and average emissions decrease by 29.62%.The signal coordination optimization model prioritizes improving traffic capacity under high saturation and reducing average emissions under low saturation.

关 键 词：交通工程 环形交叉口 信号协同优化 交通组织 通行能力 车辆平均排放 

分 类 号：U491[交通运输工程—交通运输规划与管理]