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Transportation policy of the United States

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Policy development

The Commerce Clause of the United States Constitution grants Congress the power to regulate interstate commerce, and this power was upheld by the Supreme Court in Gibbons v. Ogden. Transportation regulations are created by agencies within the Department of Transportation, and the department is responsible for carrying out federal transportation policy. The mission statement of the Department of Transportation is "to deliver the world’s leading transportation system, serving the American people and economy through the safe, efficient, sustainable, and equitable movement of people and goods." Congress is also authorized to establish post roads as part of the Postal Clause. Federal transportation policy is codified under Title 49 of the United States Code and Title 49 of the Code of Federal Regulations.

The need for federal transportation policy arose as the United States spread westward in the 19th century. The National Road was funded by the federal government in 1806 to connect the East Coast and the Midwest. The General Survey Act of 1824 authorized surveys to plan transportation routes that were considered to be of national importance. The Department of Transportation was established in 1967. The Hazardous Materials Transportation Act of 1975 tasked the Department of Transportation with regulating the transport of hazardous materials. Transportation policy was heavily deregulated in the 1970s and 1980s. Transportation planning was reformed by the Intermodal Surface Transportation Efficiency Act of 1991.

The September 11 attacks and the 2001 anthrax attacks prompted significant changes to transportation security policy in the 2000s. The Aviation and Transportation Security Act created the Transportation Security Administration (TSA), which took over responsibilities for airport security from private companies. The Department of Homeland Security was created by the Homeland Security Act of 2002, and this department took control of the TSA, U.S. Customs and Border Protection, and the United States Coast Guard, among other agencies.

Regarding public transportation, systems are supported by federal funding and managed by state and local governments, with federal funding including revenue from motor fuel taxes and state and local funding including revenue from sale and income taxes. However, there has historically been more focus on the funding of highways rather than public transportation systems, with infrastructure for public transit being defunded to support new construction of highways. Public transportation relies on federal funding to create more choices of transit, maintain affordability, connect with private businesses, and improve mobility efficiency. Public transportation also relies on state and local governments for proper regulation and coordination between agencies, as well as proper distribution of funds.

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