Many people lined up on subway platform, about to board suway train.

The City of Toronto’s City Planning Division, together with the TTC, is planning a new rapid transit line to connect Line 1 Yonge-University, downtown to Line 2 Bloor-Danforth, east of the Don River. This line is critical and will relieve crowding on Line 1 Yonge-University, at Bloor-Yonge Station, and on the surface transit routes coming in and out of downtown. 

Preliminary work is well underway for the Relief Line South with several crews conducting field testing along and in the vicinity of the approved alignment. Field testing involves obtaining ground samples, requiring some drilling and coring, to gather essential data. For up-to-date information on this preliminary work, visit our dedicated page for Relief Line South field testing.

Further Information

You can learn more about this project by visiting External link opens in new window.

If you have further questions or would like additional information, please contact the project team at 416-338-1065 or