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Paper Information

Journal:   AMIRKABIR   Summer 2004 , Volume 15 , Number 59-C; Page(s) 58 To 67.
 
Paper: 

TWO HEURISTICS FOR OPTIMAL SIGNAL SETTING PROBLEM

 
 
Author(s):  ZOKAEE ASHTIANI H., FARROKHI SADABADI K.
 
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Abstract: 

In this paper, optimal signal setting problem is studied as a bilevel optimization problem. Optimization techniques suggested for solving this problem usually result in local solutions and are inefficient in solving large-scale problems. In this paper, two heuristics are proposed for solving this problem. In the first one, an alternative model is used which represents an equilibrium flow problem with multi-variable cost functions. In the second one, essentially a two phase algorithm, in the first phase signal timings are calculated by solving the system optimum problem. Later, in the second phase, user equilibrium flows are determined by solving traffic assignment problem. Performance of these two heuristics are investigated solving a small-scale and a medium-scale examples.

 
Keyword(s): OPTIMAL SIGNAL SETTING, BILEVEL PROBLEM, EQUILIBRIUM FLOW WITH MULTI-VARIABLE COST FUNCTIONS, SYSTEM OPTIMUM
 
References: 
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