Optimization of signal timing plans is normally based on operation research methods. In this paper, a new optimization technique is introduced. As a basic idea, the signal timing plan is considered as an analogy to a construction structure. Therefore, all of the basic concepts and methods of the structural analysis can be used for solving the optimal timing of the signal timing plans. The only difference compared to the conventional structural mechanics is the non-linear "elasticity" of the signal timing plans. As an objective function of the optimization, either the sum of delays or the fuel consumption or other variables like air pollutants can be used. For the solution of this equilibrium problem, algorithms from structural engineering can be applied. These algorithms are very efficient in term of computation converge very quickly. Therefore, rather complex intersection structures can be optimised with quite short computer times. Also an on-line rolling optimization of signal timing plans with measured traffic flows can easily be realised. This technique is proven to be very effective for practical applications. The new method is capable of extending the optimization from single intersections (including optimization of the cycle time) to network of traffic signals and to traffic-actuated controllers.
Optimization of Signal Timing by Equilibrium Technique
Seventh International Conference of Chinese Transportation Professionals Congress (ICCTP) ; 2007 ; Shanghai, China
2008-03-21
Conference paper
Electronic Resource
English
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