Table 3
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 |
