{"data":{"id":"us/49-cfr-236.407","jurisdiction":"us","citation":"49 CFR 236.407","heading":"Approach or time locking; where required.","body":"Approach or time locking shall be provided for all controlled signals where route or direction of traffic can be changed.","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 D—Traffic Control Systems"],"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":"aa149a04620ee62cbcd2b029a7c5584919118776bf80461947bf1610b5bd2d5a","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-236.406","next":"us/49-cfr-236.408"},"notice":"GroundRules: Original legal text. Not legal advice."}