Section 4(f)

The part of the Department of Transportation Act of 1966 that prohibits U.S. federal approval of any transportation project that requires the use of historic sites, public parks, recreation areas, and wildlife refuges, unless 1) there is no feasible and prudent alternative to the use of the site, and 2) the project includes all possible planning to minimize harm to the site; applies to all federal transportation agencies, including the Coast Guard, Federal Aviation Administration, Federal Highway Administration, and FEderal Transit Administration. See also constructive use. (Bucher, 1996)