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Traffic Volume Trends - December 2007

Based on preliminary reports from the State Highway Agencies, travel during December 2007 on all roads and streets in the nation changed by -3.9 percent resulting in estimated travel for the month at 236.6** billion vehicle-miles.

This total includes 80.6 billion vehicle-miles on rural roads and 156 billion vehicle-miles on urban roads and streets.

Cumulative Travel changed by -0.4 percent.

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 1982 are also included.

Travel in Millions of Vehicle Miles
All Roads and Streets

Year December Year to Date Moving 12-Month
1982 127,139 1,592,481 1,592,481
1983 129,776 1,649,108 1,649,108
1984 136,095 1,716,770 1,716,770
1985 141,584 1,774,763 1,774,763
1986 149,628 1,838,240 1,838,240
1987 155,580 1,924,328 1,924,328
1988 164,798 2,025,586 2,025,586
1989 167,530 2,107,040 2,107,040
1990 168,621 2,147,501 2,147,501
1991 172,782 2,172,214 2,172,214
1992 180,999 2,247,152 2,247,152
1993 186,828 2,296,705 2,296,705
1994 193,087 2,357,587 2,357,587
1995 193,341 2,422,776 2,422,776
1996 201,462 2,482,201 2,482,201
1997 207,322 2,560,373 2,560,373
1998 216,303 2,625,363 2,625,363
1999 221,465 2,679,459 2,679,459
2000 218,436 2,746,925 2,746,925
2001 229,627 2,795,610 2,795,610
2002 234,233 2,855,508 2,855,508
2003 238,617 2,890,450 2,890,450
2004 243,765 2,962,491 2,962,491
2005 244,201 2,992,740 2,992,740
2006 246,316 3,014,081 3,014,081
2007 236,602 3,003,218 3,003,218

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 these estimates. The Highway Performance Monitoring System provides more accurate information on an annual basis.

** System entries may not add up to given "All Systems" total due to rounding for Page 2 to 8.

December 2007 Traffic Volume Trends

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