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United States


    • 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






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