Sensitivity Analysis Based Method for Optimal Road Network Pricing |
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Authors: | Jiang Qian Ying |
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Institution: | (1) Faculty of Regional Studies, Gifu University, Yanagido, Gifu 501, Japan |
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Abstract: | Road pricing is an important economic measure for optimal management of transportation networks. The optimization objectives
can be the total travel time or total cost incurred by all the travelers, or some other environmental objective such as minimum
emission of dioxide, an so on. Suppose a certain toll is posed on some link on the network, this will give an impact on flows
over the whole network and brings about a new equilibrium state. An equilibrium state is a state of traffic network at which
no traveler could decrease the perceived travel cost by unilaterally changing the route. The aim of the toll setting is to achieve such an equilibrium state that
a certain objective function is optimized. The problem can be formulated as a mathematical program with equilibrium constraints
(MPEC). A key step for solving such a MPEC problem is the sensitivity analysis of traffic flows with respect to the change
of link characteristics such as the toll prices. In this paper a sensitivity analysis based method is proposed for solving
optimal road pricing problems. |
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Keywords: | transportation network road pricing sensitivity analysis MPEC |
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