Cordon tolling for mixed traffic flow

This study develops a cordon tolling model for mixed traffic flow including motorcycle and automobile trips with multiple origins to one destination. A simultaneous differential equation system is employed to solve two trip functions with elastic demand. This model can thus analyze the interaction between different road users on the same road. No-toll equilibrium, optimal pricing by maximizing welfare, and cordon tolling solutions are analyzed. It is shown that the tolls of automobile trips and motorcycle trips are related to the size of the modes for any location of users in the first-best optimum regime. In the case of the Taipei metropolitan area, the cordon pricing scheme yields a similar relation for the tolls of both modes regardless of the differences in the parameters of demand and cost for the two types of trips. This study can provide a reference for decision-making for transportation policies in some Asian cities with mixed traffic of motorcycles and automobiles.