Transportation United States
Railways: total: 227,736 km standard gauge: 227,736 km 1.435-m gauge (2003)
Highways:
total: 6,393,603 km
paved: 4,180,053 km (including 74,406 km of expressways)
unpaved: 2,213,550 km (2003)
Waterways:
41,009 km (19,312 km used for commerce)
note: Saint Lawrence Seaway of 3,769 km, including the Saint
Lawrence River of 3,058 km, shared with Canada (2004)
Pipelines:
petroleum products 244,620 km; natural gas 548,665 km (2003)
Ports and harbors:
Corpus Christi, Duluth, Hampton Roads, Houston, Long Beach, Los
Angeles, New Orleans, New York, Philadelphia, Tampa, Texas City
note: 13 ports north of New Orleans (South Louisiana Ports) on the
Mississippi River handle 290,000,000 tons of cargo annually.
Merchant marine:
total: 486 ships (1,000 GRT or over) 12,436,658 GRT/14,630,116 DWT
by type: barge carrier 7, bulk carrier 19, cargo 152, chemical
tanker 19, container 92, passenger 17, passenger/cargo 57, petroleum
tanker 79, refrigerated cargo 2, roll on/roll off 28, vehicle
carrier 14
foreign-owned: 49 (Australia 2, Canada 8, China 1, Denmark 20,
Malaysia 2, Netherlands 1, Norway 2, Singapore 11, Sweden 1, United
Kingdom 1)
registered in other countries: 680 (2005)
Airports:
14,857 (2004 est.)
Airports - with paved runways:
total: 5,128
over 3,047 m: 188
2,438 to 3,047 m: 221
1,524 to 2,437 m: 1,375
914 to 1,523 m: 2,383
under 914 m: 961 (2004 est.)
Airports - with unpaved runways:
total: 9,729
over 3,047 m: 1
2,438 to 3,047 m: 7
1,524 to 2,437 m: 160
914 to 1,523 m: 1,718
under 914 m: 7,843 (2004 est.)