Toronto's Rapid Transit Lines - Line 1 (Yonge-University-Spadina Subway Line)

The first Toronto subway, running under Yonge from Union Station in the south to Eglinton Station in the north, was officially opened on March 30, 1954 - https://www.toronto.ca/city-government/accountability-operations-customer-service/access-city-information-or-records/city-of-toronto-archives/whats-online/web-exhibits/canadas-first-subway/