{"data":{"id":"us/49-cfr-234.259","jurisdiction":"us","citation":"49 CFR 234.259","heading":"Warning time.","body":"Each crossing warning system shall be tested for the prescribed warning time at least once every 12 months and when the warning system is modified because of a change in train speeds. Electronic devices that accurately determine actual warning time may be used in performing such tests.","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":"4968a1864c31ddab9e62a7ce9a7ace81ff0c51bdcc496259482156e58f9434b6","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-234.257","next":"us/49-cfr-234.261"},"notice":"GroundRules: Original legal text. Not legal advice."}