Table 4-52: Highway Noise Barrier Construction

Table 4-52: Highway Noise Barrier Construction

(Miles)

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  Unknown 1963-1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Total 1963-2004
TOTAL length 6 328 54 45 65 54 106 103 64 99 (R) 143 88 89 (R) 133 54 (R) 102 (R) 140 (R) 54 (R) 82 (R) 132 78 89 105 2,205
Type I barriersa d6 210 39 30 40 35 83 88 44 78 114 63 47 (R) 95 37 (R) 70 (R) 116 (R) 31 (R) 67 (R) 95 63 78 88 1,613
Type II barriersb 0 114 14 14 24 16 8 8 19 18 18 21 16 32 15 31 23 (R) 18 (R) 11 (R) 18 13 4 14 471
All other typesc N 4 1 1 1 3 15 7 1 3 (R) 11 4 26 (R) 6 2 (R) 1 1 (R) 5 (R) 4 (R) 19 2 7 3 121
Cost (2004 $ millions) 0 329 67 57 106 72 168 163 108 176 228 144 135 203 79 180 242 110 147 207 190 171 159 3,442

KEY: N = data do not exist; R = revised.

a A Type I barrier is built on a new highway project or a physically altered existing highway.

b A Type II barrier is built to abate noise along an existing highway (often referred to as retrofit abatement) and is not mandatory.

c All other types of barriers are nonfederally funded.

d Have not been assigned a year of construction or a cost.

NOTES

Forty-five miles of barriers, while assigned a year of construction, cannot be assigned a cost.

California did not provide data for the years 1999 - 2004 and therefore these years may not be comparable with previous years.

SOURCE

U.S. Department of Transportation, Federal Highway Administration, Office of Environment and Planning, Highway Traffic Noise Barrier Construction Trends (Washington, DC: May 2006), tables 1 and 3.