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Traffic Volume Trends - April 2004

Based on preliminary reports from the State Highway Agencies, travel during April 2004 on all roads and streets in the nation changed by 3.1 percent resulting in estimated travel for the month at 245.4 billion vehicle-miles.

This total includes 96.6 billion vehicle-miles on rural roads and 148.8 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 April Year to Date Moving 12-Month
1979 129,539 484,950 1,568,530,057
1980 125,698 474,678 1,518,860,627
1981 128,465 482,077 1,528,255,529
1982 129,845 475,296 1,543,488,377
1983 132,741 496,819 1,614,003,245
1984 141,327 518,647 1,670,935,682
1985 147,635 535,547 1,733,670,508
1986 150,277 557,984 1,797,199,747
1987 159,801 593,289 1,873,544,766
1988 166,804 625,267 1,956,305,868
1989 174,320 655,793 2,056,111,968
1990 179,033 674,963 2,126,210,418
1991 179,538 669,854 2,142,391,551
1992 186,069 697,702 2,200,062,493
1993 188,737 711,130 2,260,579,373
1994 195,407 727,355 2,312,930,157
1995 198,213 764,330 2,394,562,092
1996 205,253 769,452 2,427,897,025
1997 211,290 797,319 2,510,068,260
1998 217,921 816,180 2,579,234,256
1999 220,996 826,825 2,636,007,866
2000 227,809 863,387 2,716,021,128
2001 232,226 875,680 2,759,217,218
2002 236,951 896,327 2,817,934,401
2003 238,103 893,360 2,853,384,310
2004 245,420 920,607 2,906,965,141

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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