{"data":{"id":"us/49-cfr-393.81","jurisdiction":"us","citation":"49 CFR 393.81","heading":"Horn.","body":"Every bus, truck, truck-tractor, and every driven motor vehicle in driveaway-towaway operations shall be equipped with a horn and actuating elements which shall be in such condition as to give an adequate and reliable warning signal.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER III—FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER B—FEDERAL MOTOR CARRIER SAFETY REGULATIONS","PART 393—PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION","Subpart G—Miscellaneous Parts and Accessories"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"c3c629f5dc5bd2f086921311b84356a833ff43bd6477d4934b9e7adea18fea6f","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-393.80","next":"us/49-cfr-393.82"},"notice":"GroundRules: Original legal text. Not legal advice."}