{"data":{"id":"us/49-cfr-523.6","jurisdiction":"us","citation":"49 CFR 523.6","heading":"Heavy-duty vehicle.","body":"(a) A heavy-duty vehicle is any commercial medium- or heavy-duty on-highway vehicle or a work truck, as defined in 49 U.S.C. 32901(a)(7) and (19). For the purpose of this section, heavy-duty vehicles are divided into four regulatory categories as follows:\n(1) Heavy-duty pickup trucks and vans;\n(2) Heavy-duty vocational vehicles;\n(3) Truck tractors with a GVWR above 26,000 pounds; and\n(4) Heavy-duty trailers.\n(b) The heavy-duty vehicle classification does not include vehicles excluded as specified in 49 CFR 535.3.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER V—NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","PART 523—VEHICLE CLASSIFICATION"],"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":"94577cff23b1e8b05d25a3e991fb5c5780c66d583737dc07bdf757305a79811e","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-523.5","next":"us/49-cfr-523.7"},"notice":"GroundRules: Original legal text. Not legal advice."}