针对突发公共事件下城市区域范围的人员疏散会选择不同交通方式的实际情况,构建了包括路网、离散动态分析、混合流模拟3个模块的城市混合疏散模型的基本框架。其中,混合流模拟模块针对疏散状况下避难者"见空就钻"的心理特点,构建了基于统一元胞空间的混合流元胞自动机模型。同时,利用该模型研究了人、自行车和机动车不同配比疏散时的疏散时间。研究结果发现,多种疏散方式的混合疏散可以提高疏散效率,但当机动车较多的情况下,自行车的混入将降低疏散时间。
During city emergencies, people evacuate to safe areas using various transport modes. A mixed traffic evacuation model was developed to study the influence of the transport mode. The mode consists of a transportation network module, a discrete dynamic macro-analysis module, and an individual-based evacuation module. The individual evacuation module includes the effect of panic through a cellular automaton model with uniform cell areas. The simulations focus on the evacuation time for various combinations of people, bicycles and motor vehicles. The results show that mixed traffic evacuation methods reduce the evacuation time and improve the evacuation efficiency, however if there are too many motor vehicles on the road, the interaction between the bicycles and the vehicles increases the evacuation time.