---
kind: "section"
citation: "49 C.F.R. § 236.824"
title: "49"
number: "236.824"
heading: "System, automatic block signal."
url: "https://uscodex.org/cfr/49/236.824"
---

# §236.824. System, automatic block signal.


A block signal system wherein the use of each block is governed by an automatic block signal, cab signal, or both.


## Notes

### Authority

Authority: 49 U.S.C. 20102-20103, 20107, 20133, 20141, 20157, 20301-20303, 20306, 20501-20505, 20701-20703, 21301-21302, 21304; 28 U.S.C. 2461 note; and 49 CFR 1.89.

### Source

Source: 33 FR 19684, Dec. 25, 1968, unless otherwise noted.