Toronto subway
The Toronto subway is a rapid transit system serving Toronto and the neighbouring city of Vaughan in Ontario, Canada, operated by the Toronto Transit Commission (TTC). As of September 2023, the subway system is a rail network consisting of three heavy-capacity rail lines operating predominantly underground. As of December 2022, three new lines are under construction: two light rail lines (one running mostly below ground, the other running mostly at-grade) and one light metro line (running both underground and on elevated guideways).
In 1954, the TTC opened Canada's first underground rail line, then known as the "Yonge subway", under Yonge Street between Union Station and Eglinton Avenue with 12 stations. As of 2023, the network encompasses 70 stations and 70.1 kilometres (43.6 mi) of route. In 2022, the system had a ridership of 235,740,000, or about 970,600 per weekday as of the third quarter of 2023, making it the busiest rapid transit system in Canada in terms of daily ridership. There are 60 stations under construction as part of three new lines, two light rail lines and one light metro line, and two extensions to existing lines.