---
kind: "section"
citation: "49 C.F.R. § 236.401"
title: "49"
number: "236.401"
heading: "Automatic block signal system and interlocking standards applicable to traffic control systems."
url: "https://uscodex.org/cfr/49/236.401"
---

# §236.401. Automatic block signal system and interlocking standards applicable to traffic control systems.


The standards prescribed in [§§ 236.201, to 236.203](/cfr/49/236.201..236.203.md), inclusive, §§ [236.205](/cfr/49/236.205.md), [236.206](/cfr/49/236.206.md), [236.303](/cfr/49/236.303.md), [236.307](/cfr/49/236.307.md) and [236.309 to 236.311](/cfr/49/236.309..236.311.md), inclusive, shall apply to traffic control systems.


## Notes

### Amendments

[49 FR 3385, Jan. 26, 1984]

### 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.

### Amendments

[49 FR 3385, Jan. 26, 1984]