| Mode | 2009 | 2019 |
|---|---|---|
| Highway | ||
Public roads |
4,050,717 |
4,171,125 |
Public road lanes a |
8,542,163 |
8,785,398 |
| Pipeline | ||
Gas distribution |
2,086,689 |
2,262,562 |
Gas transmission and gathering |
324,936 |
320,041 |
| Rail | ||
Class I freight railroad |
94,048 |
92,282 |
Amtrak |
21,178 |
21,407 |
| Transit | ||
Commuter rail b |
7,561 |
7,901 |
Heavy rail b |
1,623 |
1,661 |
Light rail b,c |
1,477 |
2,088 |
| Water | ||
Navigable waterways d |
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/nts.
Last Updated: January 2021