U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
(a) Except as provided in paragraphs (b) and (c) of this section, this part applies to all standard gage railroads.
(b) This part does not apply to:
(1) A railroad that operates only on track inside an installation which is not part of the general railroad system of transportation; or
(2) Rapid transit operations in an urban area that are not connected with the general railroad system of transportation.
(3) Freight and other non-passenger trains of four-wheel coal cars.
(4) Freight and other non-passenger trains of eight-wheel standard logging cars if the height of each car from the top of the rail to the center of the coupling is not more than 25 inches.
(5) A locomotive used in hauling a train referred to in paragraph (b)(4) of this section when the locomotive and cars of the train are used only to transport logs.
(c) Except for the provisions governing uncoupling devices, this part does not apply to Tier II passenger equipment as defined in § 238.5 of this chapter (i.e., passenger equipment operating at speeds exceeding 125 mph but not exceeding 160 mph).
(d) As used in this part, carrier means “railroad,” as that term is defined below.
(e) Railroad means all forms of non-highway ground transportation that run on rails or electromagnetic guideways, including (1) commuter or other short-haul rail passenger service in a metropolitan or suburban area, and (2) high speed ground transportation systems that connect metropolitan areas, without regard to whether they use new technologies not associated with traditional railroads. Such term does not include rapid transit operations within an urban area that are not connected to the general railroad system of transportation.
(f) Any person (an entity of any type covered under 49 U.S.C. 21301,including; a manager, supervisor, official, or other employee or agent of a railroad; any owner, manufacturer, lessor, or lessee of railroad equipment, track, or facilities; any independent contractor providing goods or services to a railroad; and any employee of such owner, manufacturer, lessor, lessee, or independent contractor) who violates any requirement of this part or causes the violation of any such requirement is subject to a civil penalty of at least the minimum civil monetary penalty and not more than the ordinary maximum civil monetary penalty per violation. However, penalties may be assessed against individuals only for willful violations, and a penalty not to exceed the aggravated maximum civil monetary penalty per violation may be assessed, where:
(1) A grossly negligent violation, or a pattern of repeated violations, has created an imminent hazard of death or injury to persons; or
(2) A death or injury has occurred. See 49 CFR part 209, appendix A. Each day a violation continues shall constitute a separate offense. See FRA's website at https://railroads.dot.gov/for a statement of agency civil penalty policy.
(g) Except as provided in paragraph (b) of this section, § 231.31 also applies to an operation on a 24-inch, 36-inch, or other narrow gage railroad.