关键词: 城市交通, 过江通道, BOT, 收费定价, 弹性需求, 用户均衡, 拥挤道路使用收费

Abstract:

Urban river-crossing traffic charging scheme of BOT contains several factors, which include franchise period, time-vary traffic demand and planning charging amount. Based on these crucial factors, pricing scheme is designed as the sum of basic charge fee and congestion taxes, the bi- level mathematical programming is build up with multiple lower- levels. In this mathematical programming, each lower- lever programming, which adopts users' equilibrium model with elastic traffic demand, represents one identical hour in a day; the upper-level programming maximizes the consumer surplus. In this model, congestion taxes are encapsulated into the river-crossing fee so that the latter could adaptively change with crowding status. Numerical analysis shows that when basic fee increases，the total charging amount will first increase then decrease and approach to zero, and consumer surplus will decrease and approach to zero as well. Such patterns would result in a connected feasible interval of basic fee.

Key words: urban traffic, river-crossing, build-operate-transfer, pricing scheme, elastic demand, user equilibrium, congestion taxes