基于MCA的机非混合流仿真模型

中文摘要: 针对一般性路段上的机非混合交通的形成机理问题，基于MCA提出一种新的考虑逆行因素的非机动车流仿真模型MD EBCA，模型体现了非机动车的横向+纵向灵活行驶的特点，并通过时空图和基本图仿真了有隔离栏和隔离栏的一般性道路上非机动车流的行驶规律。数值仿真实验表明：道路密度小于临界密度时，非机动车道上的车辆完全呈自由流状态行驶,交通流量与车辆数目之间呈线性关系；当道路有严格的隔离措施时，在高密度条件下非机动车流也会呈现宽运动堵塞；当道路上严格的隔离措施时，在相同密度条件下呈现同步流状态，激进型的骑车人会在认为安全的情况下侵入到机动车道形成机在混合流，并在通行条件好转时返回非机动车道。
Abstract:A new nm-vehicle traffic flow simulation model, named as MD-EBCA, was proposed, in which the phenomemon of riding against the traffic flow was considered.The proposed model was used to explain the mechanism for　the formation of the m-vehicle and nm-vehicle mixed traffic flow.According to the behaviors of nm-vehicles,the new model enables the nm-vehicles to move in both logitudinal and lateral direction.The traffic phenomemon of the　nm-vehicle flow on ordinary roads which are equipped with road fences or those which are not equipped with road fences were analyzed speperately through the spatial-temperal diagram and the fundamental diagram.The simulation result showed that the free flow is presented on the nm-vehicle road when the road density is less than the critical density,and the linear relationship between the average flow rate and nm-vehicle numbers can be observed.The phase transition F-J are suggested by observing the spatial-temporal patterns in high density when the nm-vehicle road is completely isolated from the m-vehicle lanes.When the nm-vehicle road is not isolated from the m-vehicle lanes, the phase transition F-S can be observed in the same high density,and the m-vehicle and nm-vehicle mixed traffic flow is finally formed as the aggressive riders enter the m-vehicle lanes and return back to the nm-vehicle road when the traffic turns better.