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 — Definitions236.82049 C.F.R. § 236.820Switch, interlocked.Last amended: 2017Year: 2026Length: 18 wordsOfficial source Cite as 49 C.F.R. § 236.820 (2026)A switch within the interlocking limits the control of which is interlocked with other functions of the interlocking.Previous49 C.F.R. § 236.819Next49 C.F.R. § 236.820a