@United States:Transportation
Railroads:
total: 240,000 km mainline routes (nongovernment owned)
standard gauge: 240,000 km 1.435-m gauge (1989)
Highways:
total: 6,243,163 km
paved: 3,633,520 km (including 84,865 km of expressways)
unpaved: 2,609,643 km (1990)
Inland waterways: 41,009 km of navigable inland channels, exclusive of
the Great Lakes (est.)
Pipelines: petroleum 276,000 km; natural gas 331,000 km (1991)
Ports: 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: 354 ships (1,000 GRT or over) totaling 11,462,000
GRT/16,477,000 DWT
ships by type: bulk 22, cargo 28, chemical tanker 16, intermodal 130,
liquefied gas tanker 13, passenger-cargo 2, tanker 130, tanker
tug-barge 13
note: in addition, there are 189 government-owned vessels
Airports:
total: 15,032
with paved runways over 3,047 m: 181
with paved runways 2,438 to 3,047 m: 208
with paved runways 1,524 to 2,437 m: 1,242
with paved runways 914 to 1,523 m: 2,489
with paved runways under 914 m: 8,994
with unpaved runways over 3,047 m: 1
with unpaved runways 2,438 to 3,047 m: 7
with unpaved runways 1,524 to 2,438 m: 180
with unpaved runways 914 to 1,523 m: 1,730
@United States:Communications
Telephone system: 126,000,000 telephones; 7,557,000 cellular
telephones
local: NA
intercity: large system of fiber-optic cable, microwave radio relay,
coaxial cable, and domestic satellites
international: 16 satellites and 24 ocean cable systems in use; 61
INTELSAT (45 Atlantic Ocean and 16 Pacific Ocean) earth stations
(1990)