Generating Highway Travel Times with a Large-Scale, Asymmetric User Equilibrium Assignment Model

An asymmetric, static user-equilibrium traffic assignment model with traffic-engineering based turning-specific link travel time functions is used to generate highway travel time functions for an 800 square km network. Specialized link delay functions for all intersection and roadway types occurring in the study network are adapted from the literature or developed. Conditions for the existence and uniqueness of the solution based on the theory of variational inequalities are checked. The network coding process and the implementation of the model are described. Results are presented and discussed. The model is found to converge to a stable solution and the solution obtained is close to the observed traffic conditions.

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