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为了优化城市物流运输配送网络和缓解城市道路交通拥堵,针对城市地下物流运输系统建立了城市物流运输网络模型,根据比例配流算法并基于用户均衡条件对比分析了是否建立地下物流系统条件下的道路交通网络的运营状态.本文以上海市洋山港港口集装箱物流运输的交通网络为例,对比未建立地下物流系统(ULS)以及其他3种在不同路段建立ULS的物流运输方案,来定量分析地下物流系统对城市道路交通网络的影响.案例仿真结果表明:建立城市地下物流系统,能够大幅度缓解地面交通拥堵;合理建设地下物流运输线路,不仅能减少地下物流建设里程,也能使道路交通网络运输结构的得到改进并提高城市物流服务水平.
In order to optimize the urban logistics transportation and distribution network and alleviate the traffic congestion in urban roads, a model of urban logistics transportation network is set up for the urban underground logistics transportation system. According to the proportional distribution algorithm and the user equilibrium conditions, the paper analyzes whether the road traffic under the underground logistics system Network operation status.In this paper, we take Shanghai Yangshan Port Container Transport Network as an example to compare the ULS and other three kinds of logistics solutions to establish ULS in different sections to quantitatively analyze the underground logistics System on the urban road traffic network.The case simulation results show that the establishment of the urban underground logistics system can greatly alleviate the traffic congestion on the ground and the reasonable construction of the underground logistics and transportation lines can not only reduce the mileage of the underground logistics construction but also make the traffic network transportation The structure is improved and the level of city logistics service is improved.