确定OD矩阵和路段选择率的方法

Estimation of an origin-destination matrix and link choice proportions

OD矩阵推算和交通分配的结果是否符合实际,受所用分配模型、分配率P是否符合实际、路段流量是否经过守恒处理等因素影响。不同的分配参数会对分配率P产生不同的影响,从而影响分配结果,最终影响反推。采用对路段选择率和OD量同时推算的方法,尽量避免由于取值问题带来的误差,从而使推算结果更符合实际。

There are many factors that influence OD matrix and traffic assignment, for example, dispersion model, link choice proportions, and so on. Link choice proportions in a network change with traffic conditions. Results from a numerical study using a hypothetical network have shown that a model allowing to be estimated simultaneously with an OD matrix form the observed data performs better than the model with a fixed predetermined.