(Hours)
Excel | CSV | Graphic Version
| Year | Very large | Large | Medium | Small |
|---|---|---|---|---|
| 1982 | 15 | 8 | 5 | 2 |
| 1987 | 26 | 16 | 10 | 3 |
| 1992 | 33 | 23 | 16 | 5 |
| 1999 | 41 | 34 | 26 | 10 |
KEY: Very large = over 3 million; Large = over 1 million-30 million; Medium = over 500,000-1 million; Small = 500,000 or less.
SOURCE: D. Shrank and T. Lomax, The 2001 Urban Mobility Report (College Station, TX: Texas Transportation Institute, 2001).