Mixed Logit模型及其在交通方式分担中的应用研究

离散选择模型的典型代表Logit模型简洁易用的特点使其在经济、交通等领域得到了广泛的应用，但同时Logit模型的两个重要缺陷限制了其应用范围。在分析了Logit模型固有的两个缺陷和Mixed Logit模型的良好性质后，比较了Logit模型与Mixed Logit模型的差异，对Mixed Logit模型的算法进行了研究，并借助SAS统计软件提供的仿真算法给出了详细的工程实践应用范例。结果表明，Mixed Logit模型有着更丰富的物理含义，对个人出行交通方式选择行为的描述更符合实际。

Study on Mixed Logit Model and Its Application in Traffic Mode Split

Logit Model is being widely used in the field of economy and transportation because of its simplicity and convenience, but at the same time, Logit model has two important disadvantages which limit the scope of its application.After studying the inherent limitation of the Logit Model, and analyzing the property and estimation method of Mixed Logit model, comparison of the two model is given. At the same time, the esfiamation arithmetic of Mixed Logit Model is presented.At last, a detailed example of the application in traffic mode split is illustrated with the estimation method in SAS software. The result indicates that Mixed Logit Model is more meaningful in estimation of the individual behavior of traffic mode choice.