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fourth rail

type of electricity transmission for railways, resulting in two rails carrying the weight and two additional rails conducting electricity
Thing type_of_electricity_transmission Q109180474
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fourth rail

Summary

fourth rail is a type of electricity transmission[1].

Key Facts

  • fourth rail's instance of is recorded as type of electricity transmission[2].
  • fourth rail's instance of is recorded as interface standard[3].
  • fourth rail is a type of rail infrastructure[4].
  • fourth rail's OpenStreetMap tag is recorded as electrified=4th_rail[5].
  • fourth rail's used by is recorded as London Underground[6].
  • fourth rail's used by is recorded as Milan Metro[7].
  • fourth rail's different from is recorded as third rail[8].
  • fourth rail's connects with is recorded as pickup shoe[9].

Body

Definition and Type

Recorded instance of include type of electricity transmission[2] and interface standard[3]. fourth rail is a type of rail infrastructure[4].

Use and Application

Recorded used by include London Underground[6] and Milan Metro[7].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . wikidata.org.
  8. [9] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). fourth rail. Retrieved May 3, 2026, from https://4ort.xyz/entity/fourth-rail
MLA “fourth rail.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/fourth-rail.
BibTeX @misc{4ortxyz_fourth-rail_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{fourth rail}}, year = {2026}, url = {https://4ort.xyz/entity/fourth-rail}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): fourth rail — https://4ort.xyz/entity/fourth-rail (retrieved 2026-05-03)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 6h ago · Lucidieaux · 2026-08-21 view diff on Wikidata ↗
    Instance of → type of electricity transmission, interface standard
    P14692 → Q21676
    Used by → London Underground, Milan Metro
    Image → Amersham tube station 2.jpg, Arcing pickup shoe.jpg
    + 6 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/48943|batch #48943]]: Add OSM wiki item IDs to items with matching OSM tags"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.