{"data":{"id":"us/49-cfr-236.708","jurisdiction":"us","citation":"49 CFR 236.708","heading":"Block.","body":"A length of track of defined limits, the use of which by trains is governed by block signals, cab signals, 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":"05ed250b02542efa0867b99a6878e3f0dbfe205386cc3ba0418cdf030f5af34d","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-236.707","next":"us/49-cfr-236.709"},"notice":"GroundRules: Original legal text. Not legal advice."}