Ontario Line

The Ontario Line is a rapid transit line under construction in Toronto, Ontario, Canada. Fifteen new stations will be built along its 15.6-kilometre (9.7 mi) length, six of them connecting to other transit lines. Its northern terminus will be at Eglinton Avenue and Don Mills Road, at Don Valley station, where it will connect with Line 5 Eglinton. Its southern terminus will be at the existing Exhibition GO Station on the Lakeshore West line. The Ontario Line was announced by the Government of Ontario on April 10, 2019. Initially estimated to cost CA$10.9 billion with completion by 2027, the line was estimated in 2026 to cost around $34 billion with an estimated opening date in the early 2030s. A groundbreaking ceremony for the project took place on March 27, 2022. On April 20, 2026, tunnelling began using two tunnel boring machines. Upon opening, the plan is for the line to be designated Line 3. This identifier was used by Line 3 Scarborough until its closure in July 2023.