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Mascouche line

Exo commuter railway line in Montreal, Quebec

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJun 28, 2026
Entity authorityQ3239152
Source-derived summary

Mascouche (also designated line 15) is a commuter rail service in Greater Montreal, Quebec. It is operated by Exo, the organization that operates the commuter rail network in Greater Montreal.

Opened on December 1, 2014, the Montreal region's newest commuter train line required the construction of 10 new train stations, several civil engineering structures, and 13 km of new railway track. This includes some track in the median of Autoroute 640 between Repentigny and Mascouche.

The Mascouche line originally used the Mount Royal Tunnel en route to Central Station but the service was shortened in the 2020s when the tunnel was converted for use by the Réseau express métropolitain (REM). Mascouche is now the only Exo rail service to not reach Downtown Montreal. Connections to downtown can be made through transfer to the REM at Côte-de-Liesse or to the Metro at Sauvé station.

History

Original service

The line was announced as the Repentigny-Mascouche line in a press conference on March 17, 2006, and follows a major campaign by residents of eastern Montréal and the northeastern suburbs to restore commuter rail service. Originally estimated at $300 million and expected to open in 2008, the line cost $670 million and opened on December 1, 2014. The project included 10 new train stations, several civil engineering structures and 13 km of new railway track.

Editorial summary

Begin with the source’s own compact description: “Mascouche line” is exo commuter railway line in Montreal, Quebec. The dossier treats that line as a proposition to test through Mascouche, line and commuter, not as a finished interpretation.

Editorial reviewA dependable orientation record for establishing vocabulary, names and a first evidence trail. The current lead gives the account dated anchors—2014, 2006, 2008—that can be checked directly. The selected authority fields contribute no independent date. For this dossier, Mascouche, line and commuter is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “exo commuter railway line in Montreal, Quebec” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jun 28, 2026. The linked authority identifier is Q3239152. The first chronological checks are 2014, 2006 and 2008.

Critical limits

Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

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  2. Expand the search: follow Mascouche line primary sources, Mascouche line archive and Mascouche research across catalogues and specialist indexes.
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Source & attribution

This entry incorporates text from Mascouche line” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.