United_States|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.)