设置非机动车等候区的信号交叉口交通流模型

城市机非混行交叉口的管理与控制是交通管理的重要内容.针对信号交叉口设置非机动车等候区的交通组织方式，建立了交叉口元胞自动机模型.对机动车流采用基于经典 NaSch(NS)的改进多车道元胞自动机模型，建立了交叉口换道规则，增加主动减速规则；对非机动车流采用具有侧向运动的扩展多值 CA模型.研究了设置等候区的车流状态特性，以及非机动车密度和等候区纵向长度对信号交叉口的影响.研究结果表明：设置等候区能在一定程度上提高交叉口的通行能力，但长度并非越长越好，当长度过长时在一定条件下会增大对机动车流的阻滞，总体上等候区是一种值得借鉴的方式；非机动车密度对机动车流的基本图具有显著影响.

Traffic Flow Model of Signalized Intersection with Non-motor Vehicle Waiting Area

The management and control of urban mixed flow intersection is an important part of traffic management. Aiming to the traffic organization mode of setting up non-motor vehicle waiting area at signalized intersection, a cellular automata model of intersection is built. An improved NS-based multi-lane CA model is used to modeling the motor vehicle flow, in which the lane-changing rules and active deceleration rules are established. The non-motor vehicle flow is modeled using extended multi-value CA model with lateral motion. The traffic flow characteristics and effects of non- motor vehicle density and longitudinal length of waiting area on signalized intersection are researched. The simulation results show that, the waiting area can improve capacity of intersection to a certain extent, if the length of the area is too long, the blocking to motor vehicle flow will increase under certain conditions. On the whole, the waiting area is a kind of worth learning mode. The density of non-motor vehicles has a significant effect on the basic diagrams of motor vehicle flow.