交通事故条件下高速公路匝道控制研究

Research on ramp control of freeway having traffic accidents

为了缓解高速公路交通事故条件下因道路通行能力降低而产生的交通拥挤问题,提高路网可靠度和效率.在分析交通事故对高速公路通行能力影响的基础上,采用入口匝道协调控制并结合线性控制算法建立模型,确定以高速公路通行效率最大为目标函数,以匝道入口排队长度、入口匝道可插入主线车辆数、主线通行能力和实际条件为约束条件.基于Matlab软件给出模型的求解算法和步骤,并通过实例验证了模型的适用性.

In order to alleviate the traffic congestion caused by decreasing expressway traffic capacity when having traffic accidents,and to improve the road network reliability and efficiency.Based on it,this paper analyze the influence of traffic accident on expressway traffic capacity and types to adopt the on-ramp coordinated control and combine the linear control algorithm to establish model.This model chooses highway traffic efficiency biggest as the objective function,and makes the queue length on the entrance of the ramp;the vehicle number can insert the main line from the entrance ramp,main traffic capacity and actual conditions as the constraint conditions.In order to make the model conform to the highway traffic characteristics when having traffic accidents,this paper put forward several calculate formulas to calculate the vehicle number that insert the main line from the entrance ramp under different lateral lane traffic flows.Finally,we use Matlab software to calculate and verify the availability of the model by an example.