| Year | Linear Length of Noise Barriers (Miles) |
Actual Cost ($Millions) |
2010 Cost ($Millions) |
|---|---|---|---|
| 1963-1989 | 736 | 591 | 1,097 |
| 1990 | 64 | 76 | 124 |
| 1991 | 99 | 122 | 203 |
| 1992 | 142 | 154 | 261 |
| 1993 | 84 | 99 | 163 |
| 1994 | 88 | 103 | 158 |
| 1995 | 127 | 155 | 226 |
| 1996 | 54 | 62 | 92 |
| 1997 | 101 | 149 | 202 |
| 1998 | 144 | 207 | 290 |
| 1999 | 54 | 100 | 130 |
| 2000 | 83 | 137 | 168 |
| 2001 | 114 | 207 | 254 |
| 2002 | 96 | 296 | 356 |
| 2003 | 92 | 170 | 202 |
| 2004 | 129 | 188 | 216 |
| 2005 | 89 | 190 | 211 |
| 2006 | 118 | 238 | 257 |
| 2007 | 105 | 266 | 279 |
| 2008 | 49 | 103 | 104 |
| 2009 | 87 | 201 | 205 |
| 2010 | 95 | 245 | 245 |
| Unknown | 6 | 0 | 0 |
| All | 2,748 | 4,058 | 5,444 |
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 - 55
