2011 Volume 67 Issue 5 Pages 67_I_481-67_I_489
Assignment of route flows is required when examining fare discount of some routes on urban expressways. In general, traffic assignment of a large-scale road network needs much computation capacity and computation time, and work of data entry and displaying results is also very tough. It is important to reduce computational cost and capacity especially when traffic assignment is made many times. Aggregation of traffic network is one of the methods for reducing the computation cost, maintaining the accuracy of the results. In this study, a method of aggregating the routes that consist solely of general links is developed using sensitivity analysis, and traffic assignment is made between the aggregated general link route and routes which wholey or partially include expressway link. Then, the above method is applied to a simple network and its validity and computational time reduction are examined.
