Part of the Transportation Research, Economics and Policy book series (TRES, volume 1)


Driving in the United States and other countries, one could make an educated guess about the relative importance of a road by looking at its route marker. See Figure 8.1 for a collection of route markers from different ranks of interstates, U.S. Highways, state highways, and county roads. Roads of higher ranks tend to be wider, faster, and carry more traffic. Taking Minnesota as an example, there are approximately 19,300 kilometers (12,000 miles) of Interstates and state highways (9% of the total road length) as of 2005, which account for about 60% of the total 87 billion annual vehicle-kilometers (54 billion vehicle-miles) traveled in this state (Minnesota Department of Transportation, 2005a).


Transportation Network State Highway Investment Model Network Growth Iteration0 Iteration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Metropolitan Washington Council of GovernmentsWashingtonUSA
  2. 2.Department of Civil EngineeringUniversity of MinnesotaMinneapolisUSA

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