Editing Line 1 Yonge–University (section)

==Route description==
The line forms a rough 'U' shape, with two portions running generally north–south that meet at {{stl|TTC|Union}} in the southern part of the city's downtown, and then gradually spreading farther apart as they proceed northward. From Union station, the eastern portion of the line runs straight under or nearby [[Yonge Street]], sometimes in an uncovered trench, for {{convert|16|km|mi|abbr=out}} to its northeastern terminus at [[Finch Avenue]], connecting with [[Line 2 Bloor–Danforth]] at {{stl|TTC|Bloor–Yonge}} and [[Line 4 Sheppard]] at {{stl|TTC|Sheppard–Yonge}}. This eastern portion, often just called the "Yonge Line", serves [[Downtown Toronto]], [[Midtown, Toronto|Midtown Toronto]] and [[York Mills]] before ending at Finch Avenue, the northern edge of [[North York City Centre|North York Centre]].

The western portion snakes northwesterly from Union, initially running straight under [[University Avenue (Toronto)|University Avenue]] and [[Queen's Park (Toronto)|Queen's Park]] Crescent to [[Bloor Street]], where it turns westerly to run under Bloor Street for about {{convert|700|m|mi}}. Along this stretch, it interchanges with Line 2 at {{stl|TTC|St. George}} and [[Spadina station]]s. At Spadina Avenue, it turns north to run for roughly {{convert|1|km|mi|1}} under [[Spadina Road]] before curving northwesterly to continue along the [[Castle Frank Brook|Nordheimer]] and [[Cedarvale Park (Toronto)|Cedarvale]] ravines to the foot of [[Allen Road]] at [[Eglinton Avenue]]. It reaches the surface and continues northward in the road's median for {{convert|6|km|mi|abbr=out}} past Wilson Station, after which it resumes travelling underground and runs northwesterly on an off-street alignment below suburban industrial areas and the [[York University]] campus until [[Steeles Avenue]]. From there, it turns to parallel [[Jane Street (Toronto)|Jane Street]] for roughly {{convert|1.5|km|mi|abbr=out|1}} until its northwestern terminus in the neighbouring city of [[Vaughan]]'s planned downtown core, the [[Vaughan Metropolitan Centre]], at the intersection of Jane Street and [[List of numbered roads in York Region|Highway 7]]. This western portion serves [[the Annex]] and [[Forest Hill, Toronto|Forest Hill]] neighbourhoods in [[Old Toronto]]; [[Humewood–Cedarvale]] in the former city of [[York, Ontario|York]]; [[Yorkdale–Glen Park]], [[Downsview]], the [[York University Heights|York University Heights–Northwood Park]] areas in the former [[North York]]; and the Vaughan Metropolitan Centre in Vaughan.