A real-time traffic signal control system: architecture, algorithms, and analysis |
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| Authors: | Pitu Mirchandani Larry Head |
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| Institution: | 1. Department of Systems and Industrial Engineering, University of Arizona, Tucson, AZ 85721, USA;2. Gardner Transportation Systems Inc., 6375 East Tanque Verde #170, Tucson, AZ 85715, USA;1. Posgrado en Ciencias de la Ingenieria, Tecnologico Nacional de Mexico/ Instituto Tecnologico de Tijuana, Tijuana, Baja California, Mexico;2. Universidad Autonoma de Baja California, Tijuana, Baja Califronia, Mexico;1. Faculty of Science, Engineering and Technology, Swinburne University of Technology, Australia;2. Korteweg-de Vries Institute for Mathematics, Universiteit van Amsterdam, The Netherlands;3. Delft University of Technology, Delft, The Netherlands |
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| Abstract: | The paper discusses a real-time traffic-adaptive signal control system referred to as RHODES. The system takes as input detector data for real-time measurement of traffic flow, and “optimally” controls the flow through the network. The system utilizes a control architecture that (1) decomposes the traffic control problem into several subproblems that are interconnected in an hierarchical fashion, (2) predicts traffic flows at appropriate resolution levels (individual vehicles and platoons) to enable pro-active control, (3) allows various optimization modules for solving the hierarchical subproblems, and (4) utilizes a data structure and computer/communication approaches that allow for fast solution of the subproblems, so that each decision can be downloaded in the field appropriately within the given rolling time horizon of the corresponding subproblem. The RHODES architecture, algorithms, and its analysis are presented. Laboratory test results, based on implementation of RHODES on simulation models of actual scenarios, illustrate the effectiveness of the system. |
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| Keywords: | Traffic controls Traffic optimization Real time systems Adaptive controls |
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