American Trucking Ass'ns, Inc. v. City of Los Angeles
American Trucking Ass'ns, Inc. v. City of Los Angeles, 569 U.S. 641 (2013), was a case in which the Supreme Court of the United States held that certain regulations imposed by City of Los Angeles on trucking companies were preempted by federal law. In 2006 the Board of Harbor Commissioners for Los Angeles, California adopted an environmental protection plan that included an effort called Clean Truck Program (CTP). The stated goal of the program is to "reduce negative impacts that port [trucking] inflicts on the local community." The implementation of this  program began in 2007 and required trucking companies to comply with various requirements relating to maintenance of trucks, employment of drivers, and trucking operations. The American Trucking Associations believed some of the regulations were in violation of the Federal Aviation Administration Authorization Act of 1994 (FAAAA) and filed suit. Litigation eventually made its way up to the Supreme Court of the United States, where the Court held that two of the requirements of the CTP were in violation of the FAAAA.