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Tradeoffs among free-flow speed, capacity, cost, and environmental footprint in highway design

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  • Chen Ng

    ()

  • Kenneth Small

    ()

Abstract

This paper investigates differentiated design standards as a source of capacity additions that are more affordable and have smaller aesthetic and environmental impacts than modern expressways. We consider several tradeoffs, including narrow versus wide lanes and shoulders on an expressway of a given total width, and high-speed expressway versus lower-speed arterial. We quantify the situations in which off-peak traffic is sufficiently great to make it worthwhile to spend more on construction, or to give up some capacity, in order to provide very high off-peak speeds even if peak speeds are limited by congestion. We also consider the implications of differing accident rates. The results support expanding the range of highway designs that are considered when adding capacity to ameliorate urban road congestion. Copyright Springer Science+Business Media, LLC. 2012

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File URL: http://hdl.handle.net/10.1007/s11116-012-9395-8
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Bibliographic Info

Article provided by Springer in its journal Transportation.

Volume (Year): 39 (2012)
Issue (Month): 6 (November)
Pages: 1259-1280

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Handle: RePEc:kap:transp:v:39:y:2012:i:6:p:1259-1280

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Web page: http://www.springerlink.com/link.asp?id=103007

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Keywords: Highway design; Capacity; Free-flow speed; Parkway;

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References

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  1. Ronghui Liu & James Tate, 2004. "Network effects of intelligent speed adaptation systems," Transportation, Springer, vol. 31(3), pages 297-325, August.
  2. Cassidy, Michael J. & Bertini, Robert L., 1999. "Some traffic features at freeway bottlenecks," Transportation Research Part B: Methodological, Elsevier, vol. 33(1), pages 25-42, February.
  3. Cassidy, Michael J. & Rudjanakanoknad, Jittichai, 2005. "Increasing the capacity of an isolated merge by metering its on-ramp," Transportation Research Part B: Methodological, Elsevier, vol. 39(10), pages 896-913, December.
  4. Peltzman, Sam, 1975. "The Effects of Automobile Safety Regulation," Journal of Political Economy, University of Chicago Press, vol. 83(4), pages 677-725, August.
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Cited by:
  1. Duranton, Gilles & Turner, Matthew A, 2009. "The Fundamental Law of Road Congestion: Evidence from US cities," CEPR Discussion Papers 7462, C.E.P.R. Discussion Papers.
  2. Kenneth Small & Chen Feng Ng, 2013. "Optimizing Road Capacity and Type," Working Papers 121309, University of California-Irvine, Department of Economics.
  3. Clifford Winston, 2013. "On the Performance of the U.S. Transportation System: Caution Ahead," Journal of Economic Literature, American Economic Association, vol. 51(3), pages 773-824, September.
  4. Robin Lindsey & André De Palma, 2013. "Cost Recovery from Congestion Tolls with Long-run Uncertainty," Working Papers hal-00784299, HAL.

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