---
kind: "section"
citation: "30 C.F.R. § 57.14132"
title: "30"
number: "57.14132"
heading: "Horns and backup alarms for surface equipment."
url: "https://uscodex.org/cfr/30/57.14132"
---

# §57.14132. Horns and backup alarms for surface equipment.

- (a) Manually-operated horns or other audible warning devices provided on self-propelled mobile equipment as a safety device shall be maintained in a functional condition.
- (b)
  - (1) When the operator has an obstructed view to the rear, self-propelled mobile equipment shall have—
    - (i) An automatic reverse-activated signal alarm;
    - (ii) A wheel-mounted bell alarm which sounds at least once for each three feet of reverse movement;
    - (iii) A discriminating backup alarm that covers the area of obstructed view; or
    - (iv) **An observer to signal when it is safe to back up.**
  - (2) Alarms shall be audible above the surrounding noise level.
  - (3) An automatic reverse-activated strobe light may be used at night in lieu of an audible reverse alarm.
- (c) **This standard does not apply to rail equipment.**

## Notes

### Source

Source: 53 FR 32528, Aug. 25, 1988, unless otherwise noted.

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.