Table 2: Airports Served by Rail Modes,
,Airports
Intercity rail only,2
Commuter rail only,5
Heavy rail only,7
Light rail only,4
Intercity and commuter rail,2
Intercity and heavy rail,1
Commuter and heavy rail,1
"Intercity, commuter, and light rail",1
"SOURCE:  U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Preliminary Intermodal Connectivity Database, July 2007.",