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 — Definitions236.72549 C.F.R. § 236.725Circuit, switch shunting.Last amended: 2017Year: 2026Length: 13 wordsOfficial source Cite as 49 C.F.R. § 236.725 (2026)A shunting circuit which is closed through contacts of a switch circuit controller.Previous49 C.F.R. § 236.724Next49 C.F.R. § 236.726