---
kind: "section"
citation: "49 C.F.R. § 234.203"
title: "49"
number: "234.203"
heading: "Control circuits."
url: "https://uscodex.org/cfr/49/234.203"
---

# §234.203. Control circuits.


All control circuits that affect the safe operation of a highway-rail grade crossing warning system shall operate on the fail-safe principle.


## Notes

### Authority

Authority: 49 U.S.C. 20103, 20107, 20152, 20160, 21301, 21304, 21311, 22907 note; 28 U.S.C. 2461 note; and 49 CFR 1.89.

### Source

Source: 61 FR 31806, June 20, 1996, unless otherwise noted.