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Traffic Volume Trends - March 2004

Based on preliminary reports from the State Highway Agencies, travel during March 2004 on all roads and streets in the nation changed by 4.4 percent resulting in estimated travel for the month at 247.0 billion vehicle-miles.

This total includes 97.4 billion vehicle-miles on rural roads and 149.6 billion vehicle-miles on urban roads and streets.

Cumulative Travel changed by 3 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.

Travel in Millions
All Roads and Streets

Year March Year to Date Moving 12-Month
1979 131,406 355,410 1,561,731,528
1980 125,179 348,980 1,522,701,652
1981 127,798 353,612 1,525,489,108
1982 128,182 345,451 1,542,108,115
1983 132,814 364,078 1,611,107,272
1984 137,307 377,319 1,662,349,182
1985 144,424 387,912 1,727,362,759
1986 151,183 407,707 1,794,557,510
1987 157,573 433,488 1,864,020,976
1988 167,836 458,463 1,949,303,278
1989 174,990 481,473 2,048,595,375
1990 178,771 495,930 2,121,497,465
1991 179,076 490,316 2,141,886,576
1992 183,778 511,634 2,193,532,183
1993 187,869 522,393 2,257,911,274
1994 196,190 531,948 2,306,259,723
1995 201,227 566,118 2,391,756,700
1996 204,172 564,198 2,420,856,250
1997 211,952 586,028 2,504,031,336
1998 214,222 598,259 2,572,603,235
1999 220,763 605,830 2,632,933,533
2000 232,627 635,579 2,709,207,891
2001 233,582 643,454 2,754,800,325
2002 237,093 659,376 2,813,208,767
2003 236,691 655,257 2,852,232,334
2004 247,035 674,736 2,899,197,941

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.

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