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Evaluating the Effects of I-35W Bridge Collapse on Road-Users in the Twin Cities Metropolitan Region

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Author Info

  • Feng Xie
  • David Levinson

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

Abstract

This study evaluates the e?ects of I-35W bridge collapse on road-users in the Twin- Cities metropolitan area. We adopted the Twin-Cities (Metropolitan Minneapolis and St. Paul) Seven-County travel demand model developed in previous research, re-calibrated it against July 2007 loop detector tra?c data, and used this model to carry out an evaluation of economic loss incurred by increased travel delay in alter- native scenarios before and after the bridge collapse. We concluded that the failure of the I-35W bridge resulted in an economic loss of $71,000 to $220,000 a day, de- pending on how ßexible road-users in the system can adjust their trip destinations in response to the bridge closing. We also estimated that the major tra?c restoration pro jects Mn/DOT has implemented in quick response to the bridge collapse can save road-users $9,500 to $17,500 a day. This translates into a beneÞt-cost ratio of 2.0-9.0, suggesting these pro jects are highly beneÞciary in an economic sense. In this analysis, the use of a simpliÞed, scaled-down travel demand model enabled us to carry out the analysis quickly and accurately, showing its contributions in transportation planning under situations such as emergency relief and comprehensive design.

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File URL: http://nexus.umn.edu/Papers/I-35W-TRB2009-BridgeRegion.pdf
File Function: First version, 2008
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Bibliographic Info

Paper provided by University of Minnesota: Nexus Research Group in its series Working Papers with number 000043.

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Date of creation: 2008
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Publication status: Published in working paper
Handle: RePEc:nex:wpaper:i-35w-trb2009-bridgeregion

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Postal: Dept. of Civil Engineering, 500 Pillsbury Drive SE, Minneapolis, MN 55455
Phone: +01 (612) 625-6354
Fax: +01 (612) 626-7750
Web page: http://nexus.umn.edu
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Related research

Keywords: I-35W Bridge; Minnesota; Minneapolis; Economic Evaluation;

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References

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  1. David Levinson & Feng Xie & Norah Oca, 2012. "Forecasting and Evaluating Network Growth," Networks and Spatial Economics, Springer, vol. 12(2), pages 239-262, June.
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Cited by:
  1. Shanjiang Zhu & David Levinson, 2011. "Disruptions to Transportation Networks: A Review," Working Papers 000040, University of Minnesota: Nexus Research Group.

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