Yonge Subway line

Line 1 Yonge–University
Northbound platform at Union
Overview
Type	Rapid transit
System	Toronto subway
Locale	Toronto, Ontario
Termini	Finch Vaughan Metro Centre
Stations	38
Daily ridership	736,420 (2015 weekday avg)
Operation
Opened	March 30, 1954
Owner	Toronto Transit Commission
Operator(s)	Toronto Transit Commission
Depot(s)	Wilson Yard, Davisville Yard
Rolling stock	Toronto Rocket
Technical
Line length	38.8 km (24.1 mi)
Track gauge	4 ft 10 7⁄8 in (1,495 mm)
Electrification	Third rail, 600 V DC

Line 1 Yonge–University is the oldest and busiest line of the Toronto subway in Toronto, Ontario, Canada. It is operated by the Toronto Transit Commission, has 38 stations and is 38.8 km (24.1 mi) in length. It opened as the "Yonge subway" in 1954 as Canada's first underground passenger rail line, and was extended multiple times between 1963 and 2017. Averaging over 736,000 riders per weekday, Line 1 is the busiest rapid transit line in Canada, and one of the busiest lines in North America.

The eastern portion of the line runs under Yonge Street from its northeastern terminus at Finch Avenue to Toronto Union Station, connecting with Line 4 Sheppard at Sheppard–Yonge and Line 2 Bloor–Danforth at Bloor–Yonge. The western portion continues north from Union along University Avenue to St. George and Spadina, which both connect to Line 2. It runs for roughly one kilometre 1 km (0.62 mi) along Spadina Road before continuing along the Cedarvale and Nordheimer ravines to Allen Road. Its northwestern terminus, Vaughan Metro Centre, is located at the intersection of Jane Street and Highway 7 in the neighbouring city of Vaughan.

The line's name has been changed as it has been extended. Following its opening in 1954, it was called "the subway" (Yonge subway is its retronym). In 1963, it was extended along University Avenue to St. George station and renamed the "Yonge–University Line". Briefly in 1966, the Yonge–University subway ran in two branches: one west along Bloor to Keele (Yonge–University–Bloor), the other east along Bloor and Danforth to Woodbine (Yonge–University–Danforth) via Bay Lower station.