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Green Line Extension

2022 light rail line extension in Somerville, Medford, and Cambridge, Massachusetts
Place Railway Line Q5602828

Facts

13 properties

Identity

Instance of
railway line, extension of a metro line[3]

Location

Country
United States[2]
Located in the administrative territorial entity
Cambridge[1]

Population and size

Length
+4.3[14]
More facts +9
Owned by
Massachusetts Bay Transportation Authority[4]
Part of
MBTA subway, Green Line[6][7]
Capital cost
+2280000000[15]
Date of official opening
March 21, 2022, December 12, 2022[12][13]
Has part(s)
Medford Branch, Union Square Branch[8][9]
KML file
Template:Attached KML/Green Line Extension[16]
Operator
Massachusetts Bay Transportation Authority[5]
Route diagram template
Template:Green Line Extension[17]
Terminus
Union Square station, Medford/Tufts station[10][11]
🏷️ Also known as
en GLX en Green Line Extension fr extension de la ligne verte ja グリーンラインを延長 zh 波士頓輕軌綠線延伸線 zh 波士顿地铁绿线延长线 zh 波士顿轻轨绿线延长线 zh 波士顿轻轨绿线延长线工程 zh 綠線延長線 zh 绿线延长线 zh-hans 绿线延伸线 zh-hant 波士頓地鐵綠線延長線 zh-hant 波士頓輕軌綠線延長線 zh-hant 波士頓輕軌綠線延長線工程 zh-hant 綠線延伸線
🔖 Identifiers · 1
Freebase ID
/m/05zsmwr

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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. [1] ↑ . wikidata.org.
  5. [5] ↑ . wikidata.org.
  6. [6] ↑ . wikidata.org.
  7. [7] ↑ . wikidata.org.
  8. [8] ↑ . wikidata.org.
  9. [9] ↑ . wikidata.org.
  10. [10] ↑ . wikidata.org.
  11. [11] ↑ . wikidata.org.
  12. [12] ↑ . wikidata.org.
  13. [13] ↑ . wikidata.org.
  14. [14] ↑ . wikidata.org.
  15. [15] ↑ . wikidata.org.
  16. [16] ↑ . wikidata.org.
  17. [17] ↑ . 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 November 8, 2026, from https://4ort.xyz/entity/green-line-extension
MLA “Green Line Extension.” 4ort.xyz Knowledge Graph, 4ort.xyz, 8 Nov. 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: 2026-11-08}}
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 2026-11-08)

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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. 17w 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) → Medford Branch, Union Square Branch
    + 13 other properties edited (see Wikidata diff for full list)
    "Created claim: Has part(s): Medford Branch, using Frettie/consistency check add.js"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.