TABLE 1-5-4 - Miles of Highway Sound Walls Constructed: 1998-2007

TABLE 1-5-4 - Miles of Highway Sound Walls Constructed: 1998-2007

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Miles

  Type I barriers Type II barriers All other types Total
1998 116 23 1 140
1999 31 18 5 54
2000 67 11 4 82
2001 96 18 19 133
2002 63 13 2 78
2003 81 4 7 92
2004 89 14 4 107
2005 55 10 21 86
2006 77 13 23 113
2007 52 17 27 96

NOTES: California did not provide data for the years 1999-2004, and therefore these years may not be comparable with other years. A Type I barrier is built on a new highway project or a physically altered existing highway. A Type II barrier is built to abate noise along an existing highway (often referred to as retrofit abatement) and is not mandatory. All other types of barriers are nonfederally funded.

SOURCE: U.S. Department of Transportation, Federal Highway Administration, Office of Environment and Planning, Highway Traffic Noise Barrier Construction Trends (Washington, DC: August 2009), tables 1 and 3 as reported in U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, table 4-52, available at http://www.bts.gov/publications/national_transportation_statistics/ as of January 2010.