1-1 Transportation Network Length

Excel

miles

Mode 2001 2011
Highway    
Public roads 3,948,335 4,077,756
Public road lanesa 8,251,865 8,567,618
Pipeline    
Gas distribution 1,838,359 2,120,272
Gas transmission and gathering 311,391 325,174
Rail    
Class I freight railroad 97,817 95,387
Amtrak 23,000 21,225
Transit    
Commuter railb 5,209 7,576
Heavy railb 1,572 1,617
Light railb 897 1,398
Water    
Navigable waterwaysc 25,000 25,000

aMeasured in lane-miles. bMeasured in directional route-miles. cEstimated length of domestic waterways.

Sources: Highway, Rail, Transit, Water–U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, tables 1-1, 1-6, and 1-10, available at www.bts.gov as of October 2013. Pipeline–U.S. Department of Transportation, Pipeline and Hazardous Materials Administration, available at phmsa.dot.gov/pipeline/library/data-stats as of October 2013.