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 — Definitions236.83149 C.F.R. § 236.831Time, delay.Last amended: 2017Year: 2026Length: 36 wordsOfficial source Cite as 49 C.F.R. § 236.831 (2026)As applied to an automatic train stop or train control system, the time which elapses after the onboard apparatus detects a more restrictive indication until the brakes start to apply. [49 FR 3388, Jan. 26, 1984]Previous49 C.F.R. § 236.830Next49 C.F.R. § 236.831a