---
kind: "section"
citation: "49 C.F.R. § 271.601"
title: "49"
number: "271.601"
heading: "Definitions."
url: "https://uscodex.org/cfr/49/271.601"
---

# §271.601. Definitions.


As used in this subpart—

Contributing factor means a circumstance or condition that helps cause a result.

Fatigue means a complex state characterized by a lack of alertness and reduced mental and physical performance, often accompanied by drowsiness.

Fatigue-risk analysis means a railroad's analysis of its operations that:

- (1) Identifies and evaluates the fatigue-related railroad safety hazards on its system(s) and;
- (2) **Determines the degree of risk associated with each of those hazards.** FRMP means a Fatigue Risk Management Program.

  FRMP plan means a Fatigue Risk Management Program plan.

  Safety-related railroad employee means:

- (1) A person subject to 49 U.S.C. [21103](/usc/49/21103.md), [21104](/usc/49/21104.md), or [21105](/usc/49/21105.md);
- (2) Another person involved in railroad operations not subject to 49 U.S.C. [21103](/usc/49/21103.md), [21104](/usc/49/21104.md), or [21105](/usc/49/21105.md);
- (3) A person who inspects, installs, repairs or maintains track, roadbed, signal and communication systems, and electric traction systems including a roadway worker or railroad bridge worker;
- (4) A hazmat employee defined under [49 U.S.C. 5102(3)](/usc/49/5102.md?p=3);
- (5) A person who inspects, repairs, or maintains locomotives, passenger cars, or freight cars; or
- (6) An employee of any person who utilizes or performs significant railroad safety-related services, as described in [§ 271.205(a)(3)](/cfr/49/271.205.md?p=a-3), if that employee performs a function identified in [paragraphs (1) through (5)](#1..5) of this definition.

## Notes

### Source

Source: 87 FR 35673, June 13, 2022, unless otherwise noted.

### Authority

Authority: 49 U.S.C. 20103, 20106-20107, 20118-20119, 20156, 21301, 21304, 21311; 28 U.S.C. 2461 note; and 49 CFR 1.89.

### Source

Source: 85 FR 9314, Feb. 18, 2020, unless otherwise noted.