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为了克服国内对无信号控制环形交叉进行盲目改造的误区,从环形交叉口的起源与发展入手,通过对不同形式的无信号控制环形交叉口的优缺点进行对比分析,在总结国外的经验与教训的基础上,指出了不同的无信号控制环形交叉口的适用范围以及我国在无信号控制环形交叉口领域存在的问题,提出了相应的改善措施,在对常规环形交叉口进行改造时应采用入环车辆让行的规则以避免锁死现象的发生,采用进口道偏移的手段以降低入环车辆的速度以提高交叉口的安全性,增加进口道与环道的车道数以提高交叉口的通行能力。
In order to overcome the misunderstanding of the blind transformation of unsignalized circular cross in our country, starting from the origin and development of circular intersections, by comparing and analyzing the advantages and disadvantages of different forms of non-signal controlled circular intersections, the author summarizes the experiences and lessons learned from foreign countries The paper points out the applicable scope of different unsignalized roundabouts and the existing problems in the unsignalized roundabout in China, and puts forward corresponding improvement measures. In the process of retrofitting conventional roundabouts, Loop vehicles to make the rules in order to avoid the phenomenon of locking, the use of import offset means to reduce the speed into the ring of vehicles in order to improve the safety of the intersection, increase the number of lanes and ring road to improve the intersection Capacity.