In April 2019, the Yonge North Subway Extension was announced as part of the 2019 Provincial Budget. The project has been identified as the sole responsibility of Metrolinx project per Ontario Regulation 248/19.
Toronto City Council has passed several resolutions requiring that the Ontario Line be in-service prior to the in-service date of the Yonge North Subway Extension. According to the 2019 Provincial Budget, this project is planned to have an in-service date of 2029-2030, following the in-service date of the Ontario Line.
Once complete, this project will be operated by the TTC as a seamless extension of the existing TTC Line 1 Subway.
Project planning and design will be led by Metrolinx and is currently underway.