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Highway Statistics Series

Highway Statistics 2011


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Percentage Distribution of Traffic Volumes and Loadings on the Interstate System 1/

December 2012
Table TC-203

YEAR PASSENGER CARS,
BUSES AND LIGHT
SINGLE-UNIT TRUCKS		 HEAVY
SINGLE-UNIT
TRUCKS		 ALL
COMBINATION
TRUCKS
VOLUMES LOADINGS VOLUMES LOADINGS VOLUMES LOADINGS
RURAL
1990 77 3 4 7 18 89
1991 74 3 4 6 22 91
1992 76 4 4 5 21 91
1993 77 4 4 6 20 91
1994 80 2 4 9 16 89
1995 79 3 4 7 18 91
1996 78 3 4 7 19 89
1997 76 3 4 8 20 89
1998 79 2 4 7 17 91
1999 80 3 4 8 16 89
2000 80 3 4 9 15 88
2001 78 2 4 6 17 91
2002 79 3 4 8 17 90
2003 79 2 4 8 16 90
2004 79 2 5 7 16 90
2005 79 2 4 7 16 90
2006 80 2 4 6 16 92
2007 79 2 4 7 17 90
2008 77 2 5 7 18 91
2009 79 2 4 7 17 91
2010 79 2 4 7 16 91
2011 79 2 4 7 17 91
URBAN
1990 90 6 4 16 6 78
1991 89 7 3 16 7 77
1992 89 6 3 17 8 77
1993 90 4 3 19 7 77
1994 92 5 3 20 5 75
1995 89 5 4 16 7 79
1996 91 7 3 19 5 74
1997 90 4 4 18 6 78
1998 91 5 3 21 5 74
1999 90 5 4 16 6 80
2000 90 5 4 16 6 79
2001 90 5 3 15 6 80
2002 89 3 4 15 7 82
2003 91 4 4 15 6 80
2004 91 4 4 16 5 80
2005 90 4 4 16 6 80
2006 89 4 4 14 7 82
2007 88 4 4 15 8 81
2008 88 5 4 17 7 79
2009 90 4 3 18 7 78
2010 91 5 3 18 6 77
2011 91 6 3 17 6 77

1/ Based on data from the Truck Weight Study which are collected by the States for varying time periods each year and are not adjusted to typify annual averages. Loadings are based on equivalent axle loads which are the damage to a pavement caused by a vehicle axle relative to an 80 kN (18,000 lb) force which represents a standard single axle.