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直接采用占有率信息而不是密度信息更有利于交通管理的实际应用．根据三种经典的基于密度的交通流参数模型，分别推导了三种占有率速度模型和占有率流量模型．考虑参数的约束条件可使交通流模型更具有实际物理意义，给出了各基于占有率的交通流模型的参数的约束条件，并对模型的目标函数、评价指标和优化方法做了详细的探讨．实测数据的优化结果表明本文所提出的模型、约束条件和优化方法是有效的．

Research on Trafic Flow Models Based on Occupancy

Adopting occupancy information directly but not density information will be much helpful to practical application of traffic management. In accordance with three classical traffic flow parameter models based on density, three kinds of occupancy-speed models and occupancy-flow models are deduced in this paper. It makes the traffic flow models more meaningful by taking the constraint conditions into account. The constraint conditions of the parameter of occupancy-based traffic flow model are given and the objective function, evaluation index and optimization methods of these models are discussed in detail. The optimistic results show the model, constraint conditions and optimization method mentioned in this paper are effective.