{"data":{"id":"us/49-cfr-234.203","jurisdiction":"us","citation":"49 CFR 234.203","heading":"Control circuits.","body":"All control circuits that affect the safe operation of a highway-rail grade crossing warning system shall operate on the fail-safe principle.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER II—FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","PART 234—GRADE CROSSING SAFETY","Subpart D—Maintenance, Inspection, and Testing"],"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":"c27d26d6d622c81a39e757a5cc9e4ca150aec79996ca0221188e6b6bf5d4adac","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-234.201","next":"us/49-cfr-234.205"},"notice":"GroundRules: Original legal text. Not legal advice."}