United States of America/Transportation

Railways: total: 240,000 km mainline routes (nongovernment owned) standard gauge: 240,000 km 1.435-m gauge (1989)

Highways: total: 6,348,227 km paved: 3,732,757 km (including 88,727 km of expressways) unpaved: 2,615,470 km (1997 est.)

Waterways: 41,009 km of navigable inland channels, exclusive of the Great Lakes

Pipelines: petroleum products 276,000 km; natural gas 331,000 km (1991)

Ports and harbors: Anchorage?, Baltimore?, Boston, Charleston, Chicago, Duluth?, [Hampton Roads]?, Honolulu?, Houston, Jacksonville?, Los Angeles, New Orleans, New York, Philadelphia, [Port Canaveral]?, Portland (Oregon), [Prudhoe Bay]?, San Francisco, Savannah?, Seattle, Tampa?, Toledo

Merchant marine: total: 386 ships (1,000 GRT or over) totaling 11,634,608 GRT/15,574,117 DWT ships by type: barge carrier 10, bulk 67, cargo 28, chemical tanker 14, combination bulk 2, container 84, liquified gas 10, multi-functional large load carrier 3, passenger 7, passenger/cargo 1, petroleum tanker 104, roll-on/roll-off 43, short-sea passenger 3, specialized tanker 1, vehicle carrier 9 (1999 est.)

Airports: 14,572 (1999 est.)

Airports - with paved runways: total: 5,174 over 3,047 m: 180 2,438 to 3,047 m: 221 1,524 to 2,437 m: 1,310 914 to 1,523 m: 2,448 under 914 m: 1,015 (1999 est.)

Airports - with unpaved runways: total: 9,398 over 3,047 m: 2 2,438 to 3,047 m: 6 1,524 to 2,437 m: 155 914 to 1,523 m: 1,661 under 914 m: 7,574 (1999 est.)

Heliports: 118 (1999 est.)