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Travel Time Variability After A Shock: The Case Of The Twin Cities Ramp Meter Shut Off


Author Info

  • Lei Zhang
  • David Levinson

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


Ramp meters in the Twin Cities were turned off for 8 weeks in the Fall of 2000. This paper analyzes travel time variability with and without ramp metering for several representative freeways during the afternoon peak period. Travel time variability is generally reduced with metering. However, it is found that ramp meters are particularly helpful for long trips relative to short trips. The benefits from reducing travel time variability with meters are on the order of 37% of the benefits from reducing average travel time.

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Bibliographic Info

Paper provided by University of Minnesota: Nexus Research Group in its series Working Papers with number 200309.

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Date of creation: 2001
Date of revision:
Publication status: Published in The Network Reliability of Transport (2003) Pergamon (editors Yasunori Iida and Michael Bell)
Handle: RePEc:nex:wpaper:variability

Contact details of provider:
Postal: Dept. of Civil Engineering, 500 Pillsbury Drive SE, Minneapolis, MN 55455
Phone: +01 (612) 625-6354
Fax: +01 (612) 626-7750
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Related research

Keywords: Freeway Operations; Ramp Meters; Travel Time Variability Before-and-after study; Ramp Metering System; Variable Message Signs (VMS); Freeway Service Patrol; Highway Helper Program.;

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