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Ontario Line Project

Metrolinx is proposing the construction and operation of a new 15.6-kilometre transit line located in Toronto, Ontario. As proposed, the Ontario Line Project would run from the Ontario Science Centre to Exhibition/Ontario Place, passing through downtown. Over half of the line would run through underground tunnels while the remainder would run along elevated structures and existing surface rail corridors. The project would include 15 stations, with dozens of connections to existing local and regional transit networks to support the transportation of passengers. Six of those 15 stations would connect with existing local and regional stations.


This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.


Latest update

February 11, 2021 — The Minister of Environment and Climate Change received a request on January 19, 2021, to designate the Ontario Line Project, proposed by Metrolinx. The Impact Assessment Agency of Canada is conducting an analysis and will make a recommendation to the Minister on whether to designate the project under the Impact Assessment Act.


Key documents

Key documents
Document Number Document Title File Date
1 Request for Designation of Project PDF (470 KB) January 19, 2021

List all records


Ontario Line Project
Impact Assessment Agency of Canada
600-55 York Street
Toronto, Ontario M5J 1R7
Telephone: 416-952-1576

  • Location

    • Exhibition/Ontario Place (Ontario)
    • Ontario Science Centre (Ontario)
  • Nature of Activity

    • Railways
  • Assessment Status

    In progress
  • Start Date

  • Proponent

  • Authorities

    • Impact Assessment Agency of Canada
  • Assessment Type

    Request for designation
  • Reference Number


Nearby assessments

..within 200 kilometres
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