{"data":{"id":"us/49-u.s.c.-20501","jurisdiction":"us","citation":"49 U.S.C. § 20501","heading":"Definition","body":"In this chapter, “signal system” means a block signal system, an interlocking, automatic train stop, train control, or cab-signal device, or a similar appliance, method, device, or system intended to promote safety in railroad operations.","path":["Title 49—TRANSPORTATION","CHAPTER 205—SIGNAL SYSTEMS"],"source_url":"https://uscode.house.gov/download/releasepoints/us/pl/119/103/xml_usc49@119-103.zip","current_through":"Public Law 119-103 (09/02/2026)","vintage":"","retrieved_at":"2026-09-10T06:01:06Z","sha256":"1c0ef798e14f04b43ccee40ecd3dda6e677b9116538c211bd40a9502b94f2ebf","source_id":"us","stale":false,"prev":"us/49-u.s.c.-20306","next":"us/49-u.s.c.-20502"},"notice":"GroundRules: Original legal text. Not legal advice."}