---
kind: "section"
citation: "49 C.F.R. § 234.217"
title: "49"
number: "234.217"
heading: "Flashing light units."
url: "https://uscodex.org/cfr/49/234.217"
---

# §234.217. Flashing light units.

- (a) Each flashing light unit shall be properly positioned and aligned and shall be visible to a highway user approaching the crossing.
- (b) Each flashing light unit shall be maintained to prevent dust and moisture from entering the interior of the unit. Roundels and reflectors shall be clean and in good condition.
- (c) All light units shall flash alternately. The number of flashes per minute for each light unit shall be 35 minimum and 65 maximum.

## 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.