Figure 1,,,
Revenue Vehicle-Miles by Urban Transit Mode: 1991–1999,,,
,,,
Millions of revenue vehicle-miles,,,
,Bus,,
1991,"1,553",,
1992,"1,559",,
1993,"1,578",,
1994,"1,586",,
1995,"1,591",,
1996,"1,577",,
1997,"1,606",,
1998,"1,653",,
1999,"1,719",,

Millions of revenue vehicle-miles,,,
,Demand response,Heavy rail,Commuter rail,Light rail
1991,186,508,198,27
1992,209,510,200,28
1993,243,505,203,27
1994,273,516,210,33
1995,297,522,218,34
1996,308,528,221,37
1997,350,540,230,40
1998,389,549,238,42
1999,418,561,243,47

"NOTE: Other modes, including ferryboat, trolley bus, and automated",,,,
"guideway, are not shown.",,,,

"SOURCE: U.S. Department of Transportation, Federal Transit ",,,,
"Administration, National Transit Database, Various years.",,,,