---
kind: "section"
citation: "49 C.F.R. § 220.51"
title: "49"
number: "220.51"
heading: "Radio communications and signal indications."
url: "https://uscodex.org/cfr/49/220.51"
---

# §220.51. Radio communications and signal indications.

- (a) No information may be given by radio to a train or engine crew about the position or aspect displayed by a fixed signal. However, a radio may be used by a train crew member to communicate information about the position or aspect displayed by a fixed signal to other members of the same crew.
- (b) Except as provided in the railroad's operating rules, radio communication shall not be used to convey instructions which would have the effect of overriding the indication of a fixed signal.

## Notes

### Authority

Authority: 49 U.S.C. 20102-20103, 20103 note, 20107, 21301-21302, 20701-20703, 21304, 21311; 28 U.S.C. 2461 note; and 49 CFR 1.89.

### Source

Source: 63 FR 47195, Sept. 4, 1998, unless otherwise noted.