Table 5
Noise Barrier Construction by Year
| Year | Linear Length of Noise Barriers (Miles) |
Actual Cost ($Millions) |
2007 Cost ($Millions) |
|---|---|---|---|
| 1963-1986 | 491 | 320 | 612 |
| 1987 | 54 | 46 | 78 |
| 1988 | 106 | 116 | 184 |
| 1989 | 103 | 114 | 179 |
| 1990 | 64 | 76 | 118 |
| 1991 | 99 | 122 | 193 |
| 1992 | 143 | 155 | 249 |
| 1993 | 88 | 101 | 158 |
| 1994 | 90 | 104 | 152 |
| 1995 | 133 | 160 | 222 |
| 1996 | 54 | 62 | 87 |
| 1997 | 102 | 152 | 197 |
| 1998 | 140 | 199 | 265 |
| 1999 | 54 | 98 | 121 |
| 2000 | 82 | 138 | 161 |
| 2001 | 133 | 200 | 234 |
| 2002 | 78 | 184 | 210 |
| 2003 | 92 | 181 | 204 |
| 2004 | 107 | 161 | 177 |
| 2005 | 86 | 185 | 196 |
| 2006 | 113 | 230 | 237 |
| 2007 | 96 | 241 | 241 |
| UnknownYear | 6 | 0 | 0 |
| All | 2,506 | 3,346 | 4,474 |
NOTE:
Miles of noise barriers that can neither be assigned a year of construction nor a cost - 6
Miles of barriers, while assigned a year of construction, cannot be assigned a cost - 50
