混合交通运量分布与均衡配流组合模型研究

Combinatorial model involving mixed deterministic freight volume distribution and user's equilibrium

运量分布与交通分配是交通规划中的两个关键问题 ,但现有模型在我国城市交通规划的实际应用中存在不少问题。本文基于我国城市混合交通的特点 ,借助于 share需求模型 ,建立了混合交通运量分布与平衡分配的极值模型 ,并利用最优化原理证明了模型的最优解等价于 Wardrop的用户平衡原则且最优解是唯一的。

Freight volume distribution and traffic assignment are two key problems in transportation planning. However, the existing models have some defects. Considering characteristics of Chinese urban mixed traffic, the author develops a combinatorial model involving the mixed deterministic traffic volume distribution and users equilibrium (UE) assignment on the basis of symmetrical link travel time function by aid of share model. Its uniqueness and equivalance to Wardropian principle of UE are also proved by optimization theory. Finally, the algorithm of model is given by using the direction hunting method.