限行政策下的山地城市道路交通拥堵问题研究

城市交通拥堵问题日趋严重,山地城市因特殊的地理形态,拥堵问题更为凸显,实施限行政策是缓解山地城市交通拥堵的手段之一;通过构建随机均衡配流模型来描述限行政策下山地城市交通的运行状况,并采用改进后的Dial算法对模型进行求解;研究以重庆市主城区为例,结合城市多中心组团的特性,对组团间的联系通道采取工作日机动车尾号限行措施,分析山地城市道路流量和服务水平的变化情况;研究发现,限行后组团中心区域的道路交通流量显著减少,道路服务水平明显提高,但同时交通拥堵也向周边区域发生扩散;最后,提出了缓解拥堵扩散的相关措施和建议。

A Study of Traffic Congestion Under Vehicle Restriction Policies in Mountain City

Urban traffic congestion has become more and more serious, and the problem of congestion in mountainous cities has become more prominent due to the special geographical form. The implementation of the restriction policy is one of the means to relieve traffic congestion in mountain cities. By constructing a stochastic equilibrium traffic allocation model to describe the traffic operation conditions in mountain city under the restriction policy, the improved Dial algorithm is used to solve the model. Taking the urban area of Chongqing City,China as an example, which has the characteristics of a multi center city groups, measures are taken to limit the number of vehicles on the working day for the connection channel between the groups to analyze the changes in road traffic and service levels in mountain cities. The study found that the road traffic volume in the central area of the group after the restriction was significantly reduced, and the service level of the road was significantly improved, but traffic congestion also spread to the surrounding areas. Finally, related measures and suggestions for alleviating the proliferation of congestion are put forward.