在一种改进的Nagel Schrekenberg元胞自动机交通流模型的基础上 ,提出一个高速公路双车道元胞自动机模型来模拟开放性边界条件下的车流运动 ,并考虑两车道之间左边界开放程度的比例系数α及车辆加减速概率p的影响 .计算机数值模拟结果表明 ,在车流状态的演化过程中 ,通过确定车道耦合系数b来控制车流量 ,不同的b值车流量不同 ,对车辆运动出现堵塞项的相变点有影响 . Based on an improved Nagel Schrekenberg Cellular Automata traffic flow model, a two-lane highway cellular automata model was proposed to simulate traffic flow under the open boundary conditions and to consider the openness of the left border between two lanes The ratio coefficient α and the acceleration and deceleration probability p of the vehicle.Computer numerical simulation results show that in the evolution of the vehicle flow state, the traffic flow is controlled by determining the lane coupling coefficient b, and the traffic flow of different b values ​​is different, The phase transition point of the blockage is affected.