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Traffic Volume Trends - March 2003

Based on preliminary reports from the State Highway Agencies, travel during March 2003 on all roads and streets in the nation changed by -0.3 percent as compared to March 2002 resulting in estimated travel for the month at 233.2 billion vehicle-miles. This total includes 92.1 billion vehicle-miles on rural roads and 141.1 billion vehicle-miles on urban roads and streets.

Travel for the current month as well the cumulative yearly total on all roads and streets is shown below. Similar totals for each year since 1970 are also included.

Travel in Millions
All Roads and Streets
YearMarchYear to Date
1970 90,223 247,837
1971 92,974 258,429
1972 102,926 283,664
1973 107,490 296,721
1974 100,736 282,192
1975 106,070 295,715
1976 114,284 315,272
1977 119,960 324,821
1978 125,035 341,890
1979 131,406 355,410
1980 125,179 348,980
1981 127,798 353,612
1982 128,182 345,451
1983 132,814 364,078
1984 137,307 377,319
1985 144,424 387,912
1986 151,183 407,707
1987 157,573 433,488
1988 167,836 458,463
1989 174,990 481,473
1990 178,771 495,930
1991 179,076 490,316
1992 183,778 511,634
1993 187,869 522,393
1994 196,190 531,948
1995 201,227 566,118
1996 204,172 564,198
1997 211,952 586,028
1998 214,222 598,259
1999 220,763 605,830
2000 232,627 635,579
2001 231,488 640,656
2002 233,972 654,144
2003 233,210 649,276

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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