---
kind: "section"
citation: "49 C.F.R. § 299.335"
title: "49"
number: "299.335"
heading: "Derails."
url: "https://uscodex.org/cfr/49/299.335"
---

# §299.335. Derails.

- (a) Derails shall be installed at locations where maintenance-of-way equipment can access track other than Class H0, in a configuration intended to derail the un-controlled equipment away from the mainline and at a distance from the point of intersection with the mainline that will not foul the dynamic envelope of the mainline.
- (b) Each derail shall be clearly visible to railroad personnel operating rail equipment on the affected track and to railroad personnel working adjacent to the affected track. When in a locked position, a derail shall be free of any lost motion that would allow it to be operated without removal of the lock.
- (c) Each derail shall be maintained and function as intended.
- (d) Each derail shall be properly installed for the rail to which it is applied.
- (e) If a track is equipped with a derail it shall be in the derailing position except as provided in the railroad's operating rules, special instructions, or changed to permit movement.

## Notes

### Authority

Authority: 49 U.S.C. 20103, 20107, 20133, 20141, 20302-20303, 20306, 20701-20702, 21301-21302, 21304; 28 U.S.C. 2461, note; and 49 CFR 1.89.

### Source

Source: 85 FR 69731, Nov. 3, 2020, unless otherwise noted.