考虑关联交叉口排队长度的干线协调相位差模型

为减少干线车辆延误与停车次数,将干线相邻交通信号连接起来进行协调控制。基于相邻交叉口交通流的到达特性,分析干线协调控制的内在机理。依据车流到达类型,将车队头车绿灯到达情况下的交叉口延误分为车队尾部受阻与车队不受阻两种类型。分析关联交叉口的排队特性,将排队长度引入延误计算过程,建立了四种干线协调控制相位差模型。选取青岛市珠江路干线五个相邻信号交叉口进行模型验证,得出相邻交叉口相位差与延误的相关关系,确定了使车辆延误最小的相位差。结果表明,基于排队特性的相位差模型在干线协调控制中具有一定的可行性与实用性。

Offset Model for Arterial Traffic Coordination Control Considering Queue Length at Adjacent Intersections

To reduce the vehicle delay and stop, adjacent traffic signals for arterial road were connected to achieve coordination control. The internal mechanism of arterial coordination was analyzed based on the arrival characteristics of traffic flow at adjacent signal intersections. According to the status of traffic flow arriving at downstream intersection, intersections delays at the condition of motorcade head arriving at green light were focused on two types, including motorcade trail suffocated delay and zero delay. Queue characteristics of adjacent intersections was determined ,and was introduced into the calculation of vehicle delay, then four kings of offset models for arterial coordination control were established. Selecting 5 intersections along Coastal road in the city of Qingdao as example to verify the offset model, then the correlation between offset and delay at adjacent intersections was obtained, and the offset of minimizing vehicle delay was determined. The results indicate that offset models based on queue characteristic have feasibility and practicability in the application of arterial traffic coordination control.