CFR›Title 49›Subtitle B›Chapter II›Part 236›Subpart A›Subject Group Roadway Signals and Cab Signals ContainsSections 236.21–236.26CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Sections 236.21 § 236.21 Location of roadway signals. 236.22 § 236.22 Semaphore signal arm; clearance to other objects. 236.23 § 236.23 Aspects and indications. 236.24 § 236.24 Spacing of roadway signals. 236.25 § 236.25 [Reserved] 236.26 § 236.26 Buffing device, maintenance. Previous Inspections and Tests; All Systems Inspections and Tests; All Systems Next Track Circuits Track Circuits