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Highway Statistics 2000 OHPI > Highway Statistics > 2000 > Roadway Extent > Congestion Trends

URBAN INTERSTATE SYSTEM CONGESTION TRENDS

Chart showing percent of miles and peak period travel with V/SF > or = 0.80 - for the data, see table below
YearMiles
(percent)
Peak
Period
Travel
(percent)
1987 38 64
1988 42 67
1989 44 69
1990 45 69
1991 47 70
1992 46 70
1993 32 53
1994 31 52
1995 34 55
1996 33 54
1997 35 55
1998 36 56
1999 29 46
2000 29 48


Chart showing average daily vehicles per lane - for the data, see table below
YearAverage
Daily
Vehicles
per Lane
1987 11,211
1988 11,680
1989 11,992
1990 12,264
1991 12,241
1992 12,376
1993 12,578
1994 12,808
1995 13,106
1996 13,383
1997 14,161
1998 14,588
1999 14,757
2000 14,985

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