6May AD, Bonsall P W, Hills P J.The Impacts of Different Road User Charging Systems In: Proceedings of the Transportation Into The Next Millennium [C] .Singapore: Nanyang Technological University,1998.
7S Shmanske. A Simulation of Price Discriminating Tolls [J] . Journal of Transport Economics and Policy, 1993, 27:225 - 235.
8K A Small, J A Gomez-lbanez. Road Pricing for Congestion Management: The Transition from Theory to Policy [C] .Cheltenham, UK:Road Pricing, Traffic Congestion and the Environment: Issues of Efficiency and Social Feasibility K.J. Button and E.T. Verhoef, Eds., Edward Elgar, 1998.
9E Sullivan. Evaluating the Impacts of the SR 91 Variable-Toll Express Lane Facility: Final Report [R] .San Luis Obispo, CA: Report to California Department of Transportation, Dept. of Civil and Environmental Engineering, Cal Poly State University, 1998.
10Yang H, Huang H J.Principle of Marginal-cost Pricing: How does it Work in a General Road Network [J] .Transportation Research A,1998, 32 (1): 45-54.