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November 2011 Traffic Volume Trends

Travel Trends (November 2011)

Based on preliminary reports from the State Highway Agencies, travel during November 2011 on all roads and streets in the nation changed by -0.9 percent (-2.1 billion vehicle miles) resulting in estimated travel for the month at 240.9** billion vehicle-miles.

This total includes 77.7 billion vehicle-miles on rural roads and 163.3 billion vehicle-miles on urban roads and streets.

Cumulative Travel changed by -1.4 percent (-38.3 billion vehicle miles).

The larger changes to rural and urban travel are primarily because of the expansion in urban boundaries reflected in the 2000 census. Travel estimates for 2004 and beyond will also reflect this adjustment.

Travel for the current month, the cumulative yearly total, as well as the moving 12-month total on all roads and streets is shown below. Similar totals for each year since 1986 are also included.

Travel in Millions of Vehicle Miles All Roads and Streets
Year November Year to Date Moving 12-Month
1986 147,813 1,688,612 1,830,196
1987 155,676 1,768,748 1,918,376
1988 162,957 1,860,788 2,016,367
1989 169,735 1,939,510 2,104,309
1990 171,565 1,978,880 2,146,410
1991 169,693 1,999,432 2,168,052
1992 177,380 2,066,153 2,238,935
1993 182,322 2,109,876 2,290,875
1994 190,074 2,164,501 2,351,329
1995 194,131 2,229,434 2,422,521
1996 199,643 2,280,740 2,474,081
1997 202,422 2,353,051 2,554,513
1998 211,178 2,409,060 2,616,382
1999 221,856 2,457,994 2,674,296
2000 222,861 2,529,089 2,750,554
2001 230,530 2,565,592 2,784,026
2002 230,979 2,620,576 2,850,594
2003 234,089 2,650,935 2,885,869
2004 240,518 2,717,934 2,957,221
2005 243,857 2,742,454 2,989,309
2006 246,141 2,764,930 3,011,906
2007 246,644 2,789,513 3,038,954
2008 237,669 2,732,970 2,974,581
2009 239,661 2,734,990 2,978,548
2010 243,085 2,755,408 2,998,014
2011 240,943 2,717,102 2,960,222

Traffic Volume Trends is a monthly report based on hourly traffic count data. These data, collected at approximately 4,000 continuous traffic counting locations nationwide, are used to determine the percent change in traffic for the current month compared to the same month in the previous year. This percent change is applied to the travel for the same month of the previous year to obtain an estimate of travel for the current month. Because of the limited sample sizes, caution should be used with theses estimates. The highway Performance Monitoring System provides more accurate information on an anual basis.

** System entries may not add up to the give "All Systems" total due to rounding on pages 2 to 8.

 

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