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Based on preliminary reports from the State Highway Agencies, travel during March 2007 on all roads and streets in the nation changed by 0.3 percent resulting in estimated travel for the month at 255.8** billion vehicle-miles.
This total includes 87 billion vehicle-miles on rural roads and 168.8 billion vehicle-miles on urban roads and streets.
Cumulative Travel changed by -0.8 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.
| Year | March | Year to Date | Moving 12-Month |
|---|---|---|---|
| 1982 | 128,182 | 345,451 | 1,542,108 |
| 1983 | 132,814 | 364,078 | 1,611,107 |
| 1984 | 137,307 | 377,319 | 1,662,349 |
| 1985 | 144,424 | 387,912 | 1,727,363 |
| 1986 | 151,183 | 407,707 | 1,794,558 |
| 1987 | 157,573 | 433,488 | 1,864,021 |
| 1988 | 167,836 | 458,463 | 1,949,303 |
| 1989 | 174,990 | 481,473 | 2,048,595 |
| 1990 | 178,771 | 495,930 | 2,121,497 |
| 1991 | 179,076 | 490,316 | 2,141,887 |
| 1992 | 183,778 | 511,634 | 2,193,532 |
| 1993 | 187,869 | 522,393 | 2,257,911 |
| 1994 | 196,190 | 531,948 | 2,306,260 |
| 1995 | 201,227 | 566,118 | 2,391,757 |
| 1996 | 204,172 | 564,198 | 2,420,856 |
| 1997 | 211,952 | 586,028 | 2,504,031 |
| 1998 | 214,222 | 598,259 | 2,572,603 |
| 1999 | 220,763 | 605,830 | 2,632,934 |
| 2000 | 232,627 | 635,579 | 2,709,208 |
| 2001 | 232,995 | 643,702 | 2,755,048 |
| 2002 | 236,486 | 660,029 | 2,811,937 |
| 2003 | 237,087 | 659,583 | 2,855,062 |
| 2004 | 251,656 | 688,100 | 2,918,967 |
| 2005 | 253,495 | 697,501 | 2,971,892 |
| 2006 | 255,014 | 705,677 | 3,000,916 |
| 2007 | 255,784 | 700,048 | 2,990,806 |
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.
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