中文摘要：

选择支路车流为多车型的无信号交叉口为研究对象，建立等待延误模型。假定主路车流的到达规律服从泊松分布及支路车流的穿越行为遵从可接受间隙理论，运用概率论和排列组合，分析多车型车流的排队构形，计算支路车流穿越主路车流单个间隙的概率，获得支路车流穿越主路车流单个间隙的均值，建立单位时间内支路车流的等待延误计算模型。通过选取模型中的参数数据，用MATLAB编程描述支路车流等待延误与主路车流流量、支路车流不同构形及支路车流不同排队长度的关系，结果表明该模型较为符合无信号交叉口实际运行状况。

英文摘要：

For unsignalized intersections of minor multi-type vehicle traffic flow, a waiting delay model was developed. On the premise that the major stream arrived with Poisson distribution and the crossing behavior of the minor stream obeyed the gap acceptance theory, the queue arrangement and the probability of the minor stream crossing the major stream＇s single gap were analysed through probability theory and permutation, the expectation of the minor stream crossing the major stream＇s single gap was obtained, and a minor stream unit time waiting delay model was developed. By selecting appropriate parameter values for the model, MATLAB programming was employed to analyze the relationships between the minor stream waiting delay, the main stream volume, and the different minor stream arrangements as well as the minor stream queue length. The result indicates that the model can reflect the actrl raffic flow status of unsignalized intersections.