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A Cell-Based Traffic Control Formulation: Strategies and Benefits of Dynamic Timing Plans

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  • Hong K. Lo

    (Department of Civil Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, People's Republic of China)

Abstract

This study developed a dynamic traffic-control formulation that considers the entire Fundamental Diagram. This incorporation of the Fundamental Diagram is especially important for modeling oversaturated traffic. For this purpose, traffic is modeled after the cell-transmission model (CTM), which is a convergent numerical approximation to the hydrodynamic model. We transformed CTM to a set of mixed-integer constraints and subsequently cast the dynamic signal-control problem to a mixed-integer linear program. As a dynamic platform, the formulation is flexible in dealing with dynamic timing plans and traffic patterns. It can derive dynamic as well as fixed timing plans and address preexisting traffic conditions and time-dependent demand patterns. This study produced results to show the benefit of dynamic timing plans and demonstrated that some of the existing practice on signal coordination could be further improved.

Suggested Citation

  • Hong K. Lo, 2001. "A Cell-Based Traffic Control Formulation: Strategies and Benefits of Dynamic Timing Plans," Transportation Science, INFORMS, vol. 35(2), pages 148-164, May.
    • Handle: RePEc:inm:ortrsc:v:35:y:2001:i:2:p:148-164
    DOI: 10.1287/trsc.35.2.148.10136
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    References listed on IDEAS

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    1. Daganzo, Carlos F., 1995. "The cell transmission model, part II: Network traffic," Transportation Research Part B: Methodological, Elsevier, vol. 29(2), pages 79-93, April.
    2. Newell, Gordon F., 1989. "Theory of highway traffic signals," Institute of Transportation Studies, Research Reports, Working Papers, Proceedings qt7zn2b9bc, Institute of Transportation Studies, UC Berkeley.
    3. Lo, Hong K., 1999. "A novel traffic signal control formulation," Transportation Research Part A: Policy and Practice, Elsevier, vol. 33(6), pages 433-448, August.
    4. Little, John D. C. & Kelson, Mark D. & Gartner, Nathan H., 1981. "MAXBAND : a versatile program for setting signals on arteries and triangular networks," Working papers 1185-81., Massachusetts Institute of Technology (MIT), Sloan School of Management.
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