基于单车道高速公路元胞自动机模型,提出了可以描述匝道交通行为的元胞自动机模型,并应用该模型进行了高速公路匝道交通仿真实验,发现高速公路主线交通饱和度、匝道交通流量以及匝道交织区长度是影响高速公路匝道交通汇入主线效率的主要因素,当匝道流量控制在频率低于10s/辆且交织区长度设置在125～150m范围内时,匝道交织区承受能力的改善效果最为明显。 Based on the cellular automaton model of single-lane expressway, a cellular automata model that can describe the traffic behavior of the ramp is proposed. The model is applied to simulate freeway ramp traffic, and the main factors such as traffic saturation, ramp traffic flow, The length of the ramp intertwined zone is the main factor that affects the efficiency of the on-ramp in-ramp traffic. When the ramp flow is controlled at a frequency of less than 10 s / vehicle and the interlaced zone length is set within the range of 125-150 m, The most obvious.