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Table 4-56: Highway Noise Barrier Construction

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  (R) Unknown (R) 1963-1989 (R)1990 (R)1991 (R)1992 (R)1993 (R)1994 (R)1995 (R)1996 (R)1997 (R)1998 (R)1999 (R)2000 (R)2001 (R)2002 (R)2003 (R)2004 (R)2005 (R)2006 (R)2007 (R)2008 (R)2009 (R)2010 2011 2012 2013 Total 1963-2013
TOTAL length 7 773 51 99 139 100 80 117 53 73 136 56 80 134 97 99 101 102 122 116 57 104 127 75 62 90 3,051
Type I barriersa 6 530 41 77 106 74 56 86 35 51 110 32 68 96 71 80 82 65 93 70 41 75 107 65 55 85 2,256
Type II barriersb 2 193 9 19 23 26 18 28 14 20 25 20 10 19 10 3 13 11 7 20 3 8 9 6 6 4 527
All other typesc 0 50 0 3 10 0 6 2 4 2 2 3 3 19 17 15 6 25 23 26 14 21 12 4 1 0 268
Cost (2013$ millions) 0 1,294 134 204 232 167 169 229 90 214 286 140 194 334 348 223 244 216 283 309 118 238 299 171 154 161 6,453

KEY: 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 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 Planning, Environment, and Realty, Summary of Noise Barriers Constructed by December 31, 2013 (Washington, DC: May 2016), available at http://www.fhwa.dot.gov/environment/noise/noise_barriers/inventory/ as of June 2016.