Notice of Commencement
Transit Project Assessment Process and Public Meetings
Relief Line South

The Project

The City of Toronto, Toronto Transit Commission and Metrolinx, an agency of the Province of Ontario, are working collaboratively to plan major projects aimed at improving the overall transit network and bringing more transit to communities across the city.

We are looking to achieve this through the introduction of the Relief Line South, a proposed new subway line.

The proposed Relief Line South, which is a 7.5km long subway line with 8 stations, will connect the Yonge-University-Spadina Subway (Line 1) downtown to the Bloor-Danforth Subway (Line 2). The Relief Line South will help to relieve crowding on Line 1 south of Bloor, at the Bloor-Yonge Station, and on the surface transit routes coming in and out of downtown.


Members of the public, agencies, Indigenous communities and other interested persons are encouraged to participate in the Transit Project Assessment Process (TPAP) by attending consultation opportunities or by contacting staff directly with information, comments or questions.

We invite you to attend a public meeting to learn more about the Relief Line South.

The same information on the Relief Line South will be available at all meetings, so you can choose the location convenient for you. Meetings are barrier free. Contact us if you require other accessibility accommodations.

The Process

The environmental impact of this transit project is being assessed according to the TPAP as prescribed in Ontario Regulation 231/08, Transit Projects and Metrolinx Undertakings. As part of the TPAP, an Environmental Project Report is being prepared which documents the planning process involved and the details of the Relief Line South, including existing and future environmental conditions, evaluation process, details on the preferred alignment, station locations, construction methods, and impacts, mitigation and monitoring measures.

If you have project-related questions, would like to be added to the project’s mailing list, would like to obtain/access documents prepared by the proponent, or provide input at any time, please visit