Table 3-1 Passenger Transportation Infrastructure: 2000, 2010, and 2014
| 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | |
|---|---|---|---|---|---|---|---|
| Public roads (miles) | 3,936,222 | 3,995,635 | 4,067,077 | 4,077,756 | 4,092,730 | 4,115,462 | 4,177,073 |
| Public road lanesa (miles) | 8,224,245 | 8,371,718 | 8,581,158 | 8,567,618 | 8,606,003 | 8,656,070 | 8,766,049 |
| Transit railb (miles) | 7,601 | 0 | 10,744 | 0 | 0 | 11,190 | 11,294 |
| Amtrakc (miles) | 23,000 | 22,007 | 21,178 | 21,225 | 21,334 | 21,356 | 21,356 |
| Airports | 19,281 | 19,802 | 19,457 | 19,299 | |||
| Navigable waterwaysd (miles) | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 |
aMeasured in lane-miles. bMeasured in directional route-miles. Includes commuter rail, heavy rail, and light rail. cMiles of road operated by Amtrak. Amtrak, freight railroads, and commuter rail networks share common trackage. dEstimated length of domestic waterways.
SOURCES: Public roads–U.S. Department of Transportation (USDOT), Federal Highway Administration (FHWA), Highway Statistics (multiple years), as cited in the USDOT, Bureau of Transportation Statistics (BTS), National Transportation Statistics (NTS), tables 1-1 and 1-6, available at www.bts.gov as of March 2016. Transit rail–USDOT, Federal Transit Administration, National Transit Databased, as cited in USDOT, BTS, NTS, table 1-1, available at www.bts.gov as of March 2016. Amtrak–Amtrak as cited in USDOT, BTS, NTS, table 1-1, available at www.bts.gov as of March 2016. Airports–USDOT, Federal Aviation Administration as cited in USDOT, BTS, NTS, table 1-3, available at www.bts.gov as of March 2016. Navigable waterways–U.S. Army Corps of Engineers, Institute for Water Resources, Navigation Data Center, as cited in USDOT, BTS, NTS, table 1-1, available at www.bts.gov as of March 2016.