US lawFederal (United States)RegulationsTitle 49 CFR — TransportationChapter II — FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATIONPart 236 — RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCESSubpart G — Definitions236.80649 C.F.R. § 236.806Signal, home.Last amended: 2017Year: 2026Length: 22 wordsOfficial source Cite as 49 C.F.R. § 236.806 (2026)A roadway signal at the entrance to a route or block to govern trains in entering and using that route or block.Previous49 C.F.R. § 236.805Next49 C.F.R. § 236.807