A comparison of stochastic and deterministic traffic assignment over congested networks

Yosef Sheffi and Warren Powell

Transportation Research Part B: Methodological, 1981, vol. 15, issue 1, 53-64

Abstract: The similarity between link flows obtained from deterministic and stochastic equilibrium traffic assignment models is investigated at different levels of congestion. A probit-based stochastic assignment is used (over a congested network) where the conditions for equilibrium are those given by Daganzo and Sheffi (1977). Stochastic equilibrium flows are generated using an iterative procedure with predetermined step sizes, and the resulting assignment is validated on the basis of the equilibrium criteria. The procedure is intended to assist in the choice of the most appropriate assignment algorithm for a given level of congestion.

Date: 1981
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