{"data":{"id":"us/49-cfr-172.556","jurisdiction":"us","citation":"49 CFR 172.556","heading":"RADIOACTIVE placard.","body":"(a) Except for size and color, the RADIOACTIVE placard must be as follows:\n(b) In addition to complying with § 172.519, the background color on the RADIOACTIVE placard must be white in the lower portion with a yellow triangle in the upper portion. The base of the yellow triangle must be 29 mm ±5 mm (1.1 inches ±0.2 inches) above the placard horizontal center line. The symbol, text, class number and inner border must be black.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER I—PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER C—HAZARDOUS MATERIALS REGULATIONS","PART 172—HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE INFORMATION, TRAINING REQUIREMENTS, AND SECURITY PLANS","Subpart F—Placarding"],"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":"f8aa1aa094f6bc33fce41c810c93c8feb290d4655353689d26cc4ddf497303de","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-172.555","next":"us/49-cfr-172.558"},"notice":"GroundRules: Original legal text. Not legal advice."}