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Noise Barriers Construction Trends

Type I and Type II Noise Barrier Construction By Year

 
Year Type I
Linear
Length
(miles)
Type II
Linear
Length
(miles)
Type I
(%)
Type II
(%)
1963-1983 210 114 65% 35%
1984 39 14 73% 27%
1985 30 14 68% 32%
1986 40 24 62% 38%
1987 35 16 69% 31%
1988 83 8 91% 9%
1989 88 8 92% 8%
1990 44 19 70% 30%
1991 78 18 81% 19%
1992 114 18 86% 14%
1993 63 21 75% 25%
1994 47 16 75% 25%
1995 95 32 75% 25%
1996 37 15 72% 28%
1997 70 31 69% 31%
1998 116 23 84% 16%
1999 31 18 63% 37%
2000 67 11 86% 14%
2001 95 18 84% 16%
2002 63 13 83% 17%
2003 78 4 95% 5%
2004 88 14 86% 14%
Unknown 6 0 100% 0%
ALL 1,613 471 77% 23%

 

  Linear
Length
(miles)
Total Types I and II 2,084
Total All Other Types 121
Total Types I and II
Plus All Other Types
2,205
Updated: 06/27/2017
Updated: 6/27/2017
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