Table 4-56: Highway Noise Barrier Construction

Table 4-56: Highway Noise Barrier Construction

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(Miles)

  Unknown 1963-1989 1990 1991 (R) 1,992 (R) 1,993 (R) 1,994 (R) 1,995 1996 (R) 1,997 (R) 1,998 1999 (R) 2,000 (R) 2,001 (R) 2,002 (R) 2,003 (R) 2,004 2005 2006 2007 2008 2009 2010 Total 1963-2010
TOTAL length 6 736 64 99 142 84 88 127 54 101 144 54 83 114 96 92 129 89 118 105 49 87 95 2,748
Type I barriersa d6 507 44 78 113 63 48 93 37 67 119 31 67 72 59 76 99 56 80 57 38 63 70 1,938
Type II barriersb 0 198 19 18 18 21 16 32 15 31 23 18 11 18 13 4 15 10 13 19 3 5 13 533
All other typesc N 31 1 3 11 0 24 2 2 3 2 5 5 24 24 12 15 23 25 29 8 19 12 277
Cost (2010$ millions) 0 1,097 (R) 124 (R) 203 261 163 158 226 (R) 92 202 290 (R) 130 168 254 356 202 216 211 257 279 104 205 245 5,444


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

Miles of noise barriers that can neither be assigned a year of construction nor a cost.

Miles of barriers, while assigned a year of construction, cannot be assigned a cost.

SOURCE

U.S. Department of Transportation, Federal Highway Administration, Office of Environment and Planning, Highway Traffic Noise Barrier Construction Trends (Washington, DC: December 2010), tables 5 and 7, and similar tables in earlier editions available at http://www.fhwa.dot.gov/environMent/noise/barrier/summary.htm as of Nov. 12, 2012.