地下快速路作为城市核心区道路网络扩容的主要途径之一,在缓解城市交通拥堵和地上空间资源紧张等方面发挥越来越重要的作用.然而,目前针对城市地下快速路交通智能管控策略的研究还十分有限.文中在对城市地下快速路交通运行特征进行分析的基础上,分别从通道/道路宏观层面和断面微观层面,基于宏观交通流理论提出能满足地下快速路管控需求的交通管控目标,以此为依据构建包含数据采集、实时评价和控制策略3个模块的通道/区域路网智能管控框架.以深圳侨城东路北延通道工程为依托,证实以流量与车速乘积取得最大值对应的车速及考虑跃迁概率的最优占有率分别作为宏观层面和微观层面的交通管控目标,更适应地下快速路的特殊需求,并对城市地下快速路交通智能管控策略进行详细说明.
As one of the main methods to expand the road network capacity in urban core areas,under-ground expressways are playing an increasingly important role in alleviating urban traffic congestion and above-ground space constraints.However,researches on intelligent traffic control strategies for urban underground expressways are still very limited currently.Based on the analysis of the traffic operation characteristics of urban underground expressways and macroscopic traffic flow theory,traf-fic control objectives for underground expressways are proposed from the macro level of channels/roads and micro level of cross-sections respectively.Then an intelligent control framework for the channel/regional road network is constructed,including three modules:data collection,real-time e-valuation,and control strategies.Supported by Qiaocheng East Road North Extension project in Shenzhen,the speed corresponding to the maximum product of traffic flow and speed and the optimal occupancy considering transition probabilities as the traffic control objectives at the macro level and micro level,respectively,are confirmed more suitable for the specific requirements of the underground expressway,and the intelligent traffic control strategies for urban underground expressways are ex-plained in detail.