中文摘要：

针对多车型混合车流条件下道路通行能力问题，以跟弛理论为基础，通过对大、中、小3种车型的不同组合概率及不同跟弛序列下最小车头时距的研究，得到了多车型混合车流条件下跟弛平均车头时距通行能力模型。进一步通过对3种车型不同组合下的跟弛状态、平均车头间距及三参数之间的关系，建立了多车型混合车流条件下跟弛平均车头间距通行能力模型，探讨了多车型混合车流条件下车道宽度、自行车和交叉口因素对理论通行能力的影响及修正。最后通过实例计算分析了不同小型车比例下混合车流的通行能力变化趋势，得出车型比例是影响混合车流道路通行能力的重要因素。同时论证了两个模型对多车型混合车流道路通行能力的实用性和一致性。

英文摘要：

In view of the road capacity of multi-type vehicle mixed traffic flow problems, based on the theory of car following, by studying the minimum space headway o~ the large, medium and small three kinds of vehicle of different combination probability and different car following sequences, under the condition of multiple mixed traffic flow was obtained car following mean time headway capacity model;further based on the three kinds of vehicle un- der the different combination of car following state, the mean space headway and the rela- tionship between the three parameters,under the condition of multiple mixed traffic flow is established car following mean space capacity model.Discussed under the condition of multi- type vehicle the mixed traffic flow lane width,bicycle and intersection factors the impact on the traffic capacity and correction.Finally the different car proportions of mixed traffic flow capacity of changing trend is analyzed,proportion of car is the important factors that affect the mixed traffic road capacity,also demonstrated the two models practicability and consis- tency, road capacity of multi-type vehicle mixed traffic flow.