United States Transportation:
Railways:
total: 227,736 km (2003 est.)
standard gauge: 227,736 km 1.435-m gauge
Highways:
total: 6,393,603 km (2003 est.)
paved: 4,180,053 km (including 74,406 km of expressways)
unpaved: 2,213,550 km
Waterways:
41,009 km (19,312 km used for commerce) (2004 est.)
note: Saint Lawrence Seaway of 3,769 km, including the Saint Lawrence River of 3,058 km, shared with Canada
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 3047m: 188
2438 to 3047m: 221
914 to 1523m: 2383
under 914m: 961
1524 to 2437m: 1375
(2004 est.)
Airports — with unpaved runways:
total: 9,729
over 3047m: 1
2438 to 3047m: 7
1524 to 2437m: 160
under 914m: 7843
914 to 1523m: 1718
(2004 est.)
Heliports:
155 (2004 est.)
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