{"data":{"id":"us/49-cfr-236.824","jurisdiction":"us","citation":"49 CFR 236.824","heading":"System, automatic block signal.","body":"A block signal system wherein the use of each block is governed by an automatic block signal, cab signal, or both.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER II—FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","PART 236—RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES","Subpart G—Definitions"],"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":"23bf07f46546680e2033fc6a01bcdbb9ca18442e0b4ea5fe0494be7181c41c66","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-236.823","next":"us/49-cfr-236.825"},"notice":"GroundRules: Original legal text. Not legal advice."}