Tap any paragraph to write a margin note. Your notes collect in the Desk below the text and file under cases with @. The side-by-side margin rail opens on a larger screen.

Code · U.S. Code · Title 49 - TRANSPORTATION · CHAPTER 205— SIGNAL SYSTEMS · § 20501

§ 20501. Definition

219 words·~1 min read·/usc/title-49/section-20501

A research copy — for the controlling text, always check the official state or federal source. Not legal advice.

In this chapter, “signal system” means a block signal system, an interlocking, automatic train stop, train control, or cab-signal device, or a similar appliance, method, device, or system intended to promote safety in railroad operations.
(Pub. L. 103–272, § 1(e), July 5, 1994, 108 Stat. 883.)
This section is added to eliminate the unnecessary repetition of the words used in the definition. The definition is derived from 49 App.:26(b)–(f).
Connections7 cite this · traces to 2
3 references not yet in our index
  • Pub. L. 103–272, § 1(e)
  • 108 Stat. 883
  • 129 Stat. 1684
Citation graph
cites case law
§ 20501
Definition
Fed. Reg.×4
Pub. L.×1
Stat. Comp.×1
Stat.×1
Pub. L.Pub. L. 103–272, § 1(e)
Stat.108 Stat. 883
Stat.129 Stat. 1684
Cites 5Cited by 7 across 4 sources
★   the supreme law of the land   ★
Don't Tread on Me
E Pluribus Unum — out of many, one

"If you don't know your rights, you don't have any."

Marginalia · a citizen's law index
A research desk, not legal advice. Always read the cited source before relying on a summary.
Questions or an issue? support@self-law.org
disclaimerMarginalia is a research index, not a law firm. Nothing on this site is legal, tax, or financial advice and no attorney–client relationship is formed by using it. Statutes, regulations, and case law change; summaries, search results, AI output, and member posts may be incomplete, out of date, or wrong. Any interpretation drawn from material on this site should be validated by a licensed attorney in your jurisdiction before you act on it.