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May 2011 Traffic Volume Trends

  • Travel on all roads and streets changed by -1.9% (-5.0 billion vehicle miles) for May 2011 as compared with May 2010.
  • Travel for the month is estimated to be 254.0 billion vehicle miles.
  • Cumulative Travel for 2011 changed by -1.0% (-11.7 billion vehicle miles).
  • Cumulative estimate for the year is 1,193.6 billion vehicle miles of travel.

Click here for lists of state by region

  • Estimated Vehicle-Miles of Travel by Region - May 2011 - (in Billions)
  • Change in Traffic as compared to same month last year.
Region Total Travel Percentage Change
North-East 37.9 -1.2
South-Atlantic 55.2 -1.5
North-Central 58.3 -2.1
South-Gulf 49.0 -2.2
West 53.7 -2.4


  • All data for this month are preliminary. Revised values for the previous month are shown in Tables 1 and 2.
  • All vehicle-miles of travel computed with 2009 Table VM-2 as a base.
  • Compiled with data on hand as of July 12, 2011.
  • Some historical data were revised based on HPMS and amended TVT data as of December 2009
  • For information on total licensed drivers in the U.S. visit Select the year of interest then Section III (Driver Licensing).
  • For information on total registered motor vehicles in the U.S., visit Select the year of interest and Section II (Motor Vehicles).
  1. Travel Trends (May 2011)
  2. Individual Monthly Motor Vehicle Travel in the U.S. for May 2011
  3. Changes on Rural Arterial Roads by Region and State
  4. Changes on Urban Arterial Roads by Region and State
  5. Changes on All Estimated Roads by Region and State
  6. Volume Trends - Rural
  7. Volume Trends - Urban
  8. Figure 1 - Moving 12-Month Total on All Highways
  9. Figure 2 - Travel on U.S. Highways By Month

More Information


Daniel Jenkins
Office of Highway Policy Information
E-mail Daniel


United States Department of Transportation - Federal Highway Administration