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.

[1] 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).

[2] The stated goal of the program is to "reduce negative impacts that port [trucking] inflicts on the local community.

[4] 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.

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