---
kind: "section"
citation: "49 C.F.R. § 229.117"
title: "49"
number: "229.117"
heading: "Speed indicators."
url: "https://uscodex.org/cfr/49/229.117"
---

# §229.117. Speed indicators.

- (a) After December 31, 1980, each locomotive used as a controlling locomotive at speeds in excess of 20 miles per hour shall be equipped with a speed indicator which is—
  - (1) Accurate within ±3 miles per hour of actual speed at speeds of 10 to 30 miles per hour and accurate within ±5 miles per hour at speeds above 30 miles per hour; and
  - (2) **Clearly readable from the engineer's normal position under all light conditions.**
- (b) Each speed indicator required shall be tested as soon as possible after departure by means of speed test sections or equivalent procedures.

## Notes

### Authority

Authority: 49 U.S.C. 20103, 20107, 20133, 20137-38, 20143, 20168, 20701-03, 21301-02, 21304; 28 U.S.C. 2461 note; and 49 CFR 1.89.

### Source

Source: 45 FR 21109, Mar. 31, 1980, unless otherwise noted.