Green Line Extension

2022 light rail line extension in Somerville, Medford, and Cambridge, Massachusetts
Place railway_line Q5602828
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Green Line Extension

Summary

Green Line Extension is a railway line[1].

Key Facts

  • Green Line Extension is located in Cambridge[2].
  • Green Line Extension is in the country of United States[3].
  • Green Line Extension's instance of is recorded as railway line[4].
  • Green Line Extension's instance of is recorded as extension of a metro line[5].
  • Green Line Extension is owned by Massachusetts Bay Transportation Authority[6].
  • Green Line Extension is operated by Massachusetts Bay Transportation Authority[7].
  • Green Line Extension is part of MBTA subway[8].
  • Green Line Extension is part of Green Line[9].
  • Green Line Extension's Commons category is recorded as Green Line Extension (MBTA)[10].
  • Green Line Extension's terminus is recorded as Union Square station[11].
  • Green Line Extension's terminus is recorded as Medford/Tufts station[12].
  • Green Line Extension's date of official opening is recorded as March 21, 2022[13].
  • Green Line Extension's date of official opening is recorded as December 12, 2022[14].
  • Green Line Extension's length is recorded as {'unit': 'http://www.wikidata.org/entity/Q253276', 'amount': '+4.3'}[15].
  • Green Line Extension's capital cost is recorded as {'unit': 'http://www.wikidata.org/entity/Q4917', 'amount': '+2280000000'}[16].
  • Green Line Extension's KML file is recorded as Template:Attached KML/Green Line Extension[17].
  • Green Line Extension's route diagram template is recorded as Template:Green Line Extension[18].

Body

Geography

Green Line Extension is in the country of United States[3]. It is located in Cambridge[2]. Part of include MBTA subway[8], a rapid transit[19], in United States[20], founded in 1901[21] and Green Line[9], a light rail system line[22], in United States[23].

Physical Characteristics

Green Line Extension's length is recorded as {'unit': 'http://www.wikidata.org/entity/Q253276', 'amount': '+4.3'}[15].

Designation and Status

Recorded instance of include railway line[4] and extension of a metro line[5].

History and Context

Green Line Extension is owned by Massachusetts Bay Transportation Authority[6].

References

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

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . wikidata.org.
  4. [6] . wikidata.org.
  5. [2] . wikidata.org.
  6. [7] . wikidata.org.
  7. [8] . wikidata.org.
  8. [9] . wikidata.org.
  9. [10] . wikidata.org.
  10. [11] . wikidata.org.
  11. [12] . wikidata.org.
  12. [13] . wikidata.org.
  13. [14] . wikidata.org.
  14. [15] . wikidata.org.
  15. [16] . wikidata.org.
  16. [17] . wikidata.org.
  17. [18] . wikidata.org.

Inline context (facts about related entities)

  1. [19] . Wikidata. wikidata.org. → on this site
  2. [20] . Wikidata. wikidata.org. → on this site
  3. [21] . Wikidata. wikidata.org. → on this site
  4. [22] . Wikidata. wikidata.org. → on this site
  5. [23] . Wikidata. wikidata.org. → on this site

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). Green Line Extension. Retrieved May 3, 2026, from https://4ort.xyz/entity/green-line-extension
MLA “Green Line Extension.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/green-line-extension.
BibTeX @misc{4ortxyz_green-line-extension_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Green Line Extension}}, year = {2026}, url = {https://4ort.xyz/entity/green-line-extension}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Green Line Extension — https://4ort.xyz/entity/green-line-extension (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. 11d ago · Bouzinac · 2026-07-11 view diff on Wikidata ↗
    Instance of railway line, extension of a metro line
    Kml file Template:Attached KML/Green Line Extension
    Owned by Massachusetts Bay Transportation Authority
    Has part(s) ['Q109252353', 'Q109252362']
    + 14 other properties edited (see Wikidata diff for full list)
    "/* wbcreateclaim-create:1| */ [[Property:P527]]: [[Q109252353]], using [[User:Frettie/consistency check add.js]]"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.