{"data":{"id":"us/49-cfr-221.3","jurisdiction":"us","citation":"49 CFR 221.3","heading":"Application.","body":"(a) Except as provided in paragraph (b) of this section, this part applies to passenger, commuter and freight trains when operated on a standard gage main track which is part of the general railroad system of transportation.\n(b) This part does not apply to:\n(1) A railroad that operates only trains consisting of historical or antiquated equipment for excursion, educational, or recreational purposes;\n(2) A train that operates only on track inside an installation which is not part of the general railroad system of transportation;\n(3) Rapid transit operations in an urban area that are not connected with the general railroad system of transportation.\n(4) A railroad that operates only one train at any given time.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER II—FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","PART 221—REAR END MARKING DEVICE—PASSENGER, COMMUTER AND FREIGHT TRAINS","Subpart A—General"],"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":"dceb109772de23da98f4b1b108895eb40d4a83cff67aa4c5ef3772ac1ba8db14","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-221.1","next":"us/49-cfr-221.5"},"notice":"GroundRules: Original legal text. Not legal advice."}