Vehicle Miles Traveled and Lane Mileage
| total vmt | Lane Mile Index | |
|---|---|---|
| 1980 | 1,527,295 | 100 |
| 1981 | 1,555,308 | 99.17 |
| 1982 | 1,595,010 | 101.15 |
| 1983 | 1,652,788 | 101.68 |
| 1984 | 1,720,269 | 101.94 |
| 1985 | 1,774,826 | 101.21 |
| 1986 | 1,834,872 | 101.59 |
| 1987 | 1,921,204 | 101.63 |
| 1988 | 2,025,962 | 101.59 |
| 1989 | 2,096,487 | 101.78 |
| 1990 | 2,144,362 | 101.63 |
| 1991 | 2,172,050 | 102.09 |
| 1992 | 2,247,151 | 102.55 |
| 1993 | 2,296,378 | 102.65 |
| 1994 | 2,357,588 | 102.79 |
| 1995 | 2,422,696 | 102.98 |
| 1996 | 2,485,848 | 103.24 |
| 1997 | 2,561,695 | 104.04 |
| 1998 | 2,631,522 | 103.01 |
| 1999 | 2,691,056 | 103.23 |
| 2000 | 2,749,803 | 103.8 |
