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Traffic Management Systems


  • Wei Chen
  • David Levinson

    () (Nexus (Networks, Economics, and Urban Systems) Research Group, Department of Civil Engineering, University of Minnesota)


This study uses regression analysis to evaluate long-run traffic management system performance. Three important traffic management systems in the Twin Cities metro area - Ramp Metering, Variable Message Signs (VMS), and Freeway Service Patrol (the Highway Helper Program) were evaluated with multiple regression models to predict link speed and incident rate. We find that ramp meters increase freeway link speed and reduce incident rate. Freeway Service Patrols increase link speed when incidents are present. The results for variable message signs are ambiguous.

Suggested Citation

  • Wei Chen & David Levinson, 2004. "Traffic Management Systems," Working Papers 200411, University of Minnesota: Nexus Research Group.
  • Handle: RePEc:nex:wpaper:trafficmanagementsystems

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    File Function: First version, 2007
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    References listed on IDEAS

    1. Levinson, David & Zhang, Lei, 2006. "Ramp meters on trial: Evidence from the Twin Cities metering holiday," Transportation Research Part A: Policy and Practice, Elsevier, vol. 40(10), pages 810-828, December.
    2. Banks, James H. & Kelly, Gregory, 1997. "Traffic Management Systems Performance Measurement: Final Report," Institute of Transportation Studies, Research Reports, Working Papers, Proceedings qt8cp6t00d, Institute of Transportation Studies, UC Berkeley.
    Full references (including those not matched with items on IDEAS)

    More about this item


    Traffic management system; Traffic system performance; Before-and-after study; Ramp Metering System; Variable Message Signs (VMS); Freeway Service Patrol; Highway Helper Program.;

    JEL classification:

    • R41 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - Transportation Economics - - - Transportation: Demand, Supply, and Congestion; Travel Time; Safety and Accidents; Transportation Noise
    • R48 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - Transportation Economics - - - Government Pricing and Policy
    • H42 - Public Economics - - Publicly Provided Goods - - - Publicly Provided Private Goods


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