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1 2020

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Bi-level Optimization Application for Urban Traffic Management

Stoilova Krasimira, Stoilov Todor

Annals of Computer Science and Information Systems

2020

Vol. 21

327--336

A bi-level modeling for traffic lights optimization is presented. The bi-level modeling allows increasing the set of control influences, the number of constraints and applies two goal functions in hierarchical order. The bi-level formalism allows integration of small optimization problems in hierarchical order to a complex interconnected and complicated optimization problem. These features have been applied for optimal control of traffic lights in urban network. The bi-level problem formulation allows to minimize the queue lengths of vehicles and to maximize the outgoing flows from arterial direction. Both control influences of the green light durations and time cycles are evaluated as optimal bi-level control influences.