Transportation Network Length: 2007, 2017

miles
Mode 2007 2017
Highway
Public roads
4,032,126
4,165,349
Public road lanesa
8,457,353
8,765,578
Pipeline
Gas distribution
2,346,840
2,541,991
Gas transmission and gathering
321,108
318,771
Rail
Class I freight railroad
94,313
93,058
Amtrak
21,708
21,407
Transit
Commuter railb
7,135
7,815
Heavy railb
1,623
1,653
Light railb,c
1,341
2,030
Water
Navigable waterwaysd
25,000
25,000

Notes:

aMeasured in lane-miles. bMeasured in directional route-miles. cLight Rail was revised beginning in 2011 and includes light rail, street car rail, and hybrid rail. dEstimated length of domestic waterways.

Sources:

Highway, Pipeline, Rail, Transit, and Water. As cited in U.S. Department of Transportation, Bureau of Transportation Statistics, National Transportation Statistics, tables 1-1, 1-6, and 1-10, available at https://www.bts.gov/.

Last Updated: April 2019