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・ Transportation in Seoul
・ Transportation in Seremban
・ Transportation in Shreveport
・ Transportation in South Dakota
・ Transportation in South Florida
・ Transportation in St. Louis
・ Transportation in Sugar Land, Texas
・ Transportation in Tacloban
・ Transportation in Taichung
・ Transportation in Taiwan
・ Transportation in Texas
・ Transportation in the Inland Empire
・ Transportation in the Lehigh Valley
・ Transportation in the Philippines
・ Transportation in the San Francisco Bay Area
Transportation in the United States
・ Transportation in the United States Virgin Islands
・ Transportation in Thunder Bay, Ontario
・ Transportation in Toronto
・ Transportation in Tulsa, Oklahoma
・ Transportation in Vancouver
・ Transportation in Vaughan
・ Transportation in Vienna
・ Transportation in Virginia
・ Transportation in Virginia Beach
・ Transportation in Visalia
・ Transportation in Washington, D.C.
・ Transportation in West Virginia
・ Transportation in Williamsburg, Virginia
・ Transportation inequality in the United States


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Transportation in the United States : ウィキペディア英語版
Transportation in the United States

Transportation in the United States is facilitated by road, air, rail, and waterways (via boats). The vast majority of passenger travel occurs by automobile for shorter distances, and airplane or railroad for some people, for longer distances. In descending order, most cargoes travel by railroad, truck, pipeline, or boat; air shipping is typically used only for perishables and premium express shipments.
==Ownership and jurisdiction==
The overwhelming majority of roads in the United States are owned and maintained by state and local governments. Federally maintained roads are generally found only on federal lands (such as national parks) and at federal facilities (like military bases). The Interstate Highway System is partly funded by the federal government but owned and maintained by individual state governments. There are a few private highways in the United States, which use tolls to pay for construction and maintenance. There are many local private roads, generally serving remote or insular residences.
Passenger and freight rail systems, bus systems, water ferries, and dams may be under either public or private ownership and operation. Civilian airlines are all privately owned and financed. Most airports are owned and operated by local government authorities, but there are also some private airports. The Transportation Security Administration has provided security at most major airports since 2001.
The United States Department of Transportation and its divisions provide regulation, supervision, and funding for all aspects of transportation, except for customs, immigration, and security, which are the responsibility of the United States Department of Homeland Security. Each state has its own Department of Transportation, which builds and maintains state highways, and depending upon the state, may either directly operate or supervise other modes of transportation.
Aviation law is almost entirely a federal matter, while automobile traffic laws are enacted and enforced by state and local authorities. Economic jurisdiction over tidelands is shared between the state and federal governments, while the United States Coast Guard is the primary enforcer of law and security on U.S. waterways.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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