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.

Latest update

April 16, 2021 — The Minister of Environment and Climate Change has determined that the Ontario Line Project proposed by Metrolinx does not warrant designation under the Impact Assessment Act. The reasons for the Minister’s determination are provided in the Minister’s response.


Key documents

Key documents
Document Number Document Title File Date
154 Minister's Response - April 16, 2021
153 Analysis Report PDF (42.1 MB) April 16, 2021
1 Request for Designation of Project PDF (470 KB) January 19, 2021


Ontario Line Project
Impact Assessment Agency of Canada
600-55 York Street
Toronto, Ontario M5J 1R7
Telephone: 416-952-1576
Email: designationontario@iaac-aeic.gc.ca

  • Location

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

    • Railways
  • Assessment Status

  • Proponent

  • Authorities

    • Impact Assessment Agency of Canada
  • Assessment Type

    Assessment not applicable
  • Reference Number


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.


Nearby assessments

...within 200 kilometres
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