Editing Line 1 Yonge–University (section)

== Design ==
{{more citations needed section|date=May 2017}}

=== Line ===
[[File:Line 1 track at Davisville 2023.jpg|thumb|left|An open-cut section looking south to [[Davisville station]]]]
The line is mostly underground but has several surface sections between Sheppard West and Eglinton West, and between Bloor–Yonge and Eglinton. Most of the line between Bloor–Yonge and Eglinton stations was originally constructed in open cut, with the short section between {{stl|TTC|St. Clair}} and {{stl|TTC|Summerhill}} stations having since been covered over. Evidence of this can be seen in the tunnel: there are no columns or walls between tracks, and ballast and drainage ditches are present, something not seen in the rest of the subway system. There are also tree stumps and the stubs of lamp posts in the tunnel. There are also clues outdoors: seemingly unnecessary railings along the sides of a nearby street, which was once a bridge over the tracks, and empty lots following the trains' right-of-way marked with signs warning heavy vehicles and equipment to keep off because they might fall through to the columnless tunnel below.

Most of the tunnel was constructed by a cut-and-cover method, but some sections were bored, as noted below. All stations, whether by transfer or fare-paid terminal, connect to surface TTC bus and/or streetcar routes. Other surface and train connections are noted below.

Since 1996, TTC stations have been built or modified with elevators, ramps and other features to make them accessible to all.<ref>{{cite web|title=Milestones|url=http://www.ttc.ca/About_the_TTC/History/Milestones.jsp|access-date=February 5, 2017|work=ttc.ca|publisher=Toronto Transit Commission|quote=1996: Downsview Station, Bloor-Yonge Station, and Union Station become the first accessible subway stations.|archive-date=May 6, 2021|archive-url=https://web.archive.org/web/20210506024157/http://www.ttc.ca/About_the_TTC/History/Milestones.jsp|url-status=live}}</ref> {{as of|2022|1|df=us}}, 30 stations on the line are [[Toronto Transit Commission accessibility|fully accessible]].<ref>{{Cite web|title=Accessibility – Elevators and Escalators|url=http://www.ttc.ca/TTC_Accessibility/Easier_access_on_the_TTC/Elevators_and_escalators.jsp|access-date=April 8, 2021|website=[[Toronto Transit Commission]]|language=en|archive-date=April 14, 2021|archive-url=https://web.archive.org/web/20210414191915/http://www2.ttc.ca/TTC_Accessibility/Easier_access_on_the_TTC/Elevators_and_escalators.jsp|url-status=live}}</ref> All stations on the line are projected to be made accessible by 2025, as per the [[Accessibility for Ontarians with Disabilities Act, 2005|Accessibility for Ontarians with Disabilities Act.]]<ref>{{Cite web|title=Projects – Easier Access – Easier Access Program Schedule|url=http://www.ttc.ca/About_the_TTC/Projects/Easier_Access/Easier_Access_Schedule.jsp|access-date=April 8, 2021|website=[[Toronto Transit Commission]]|archive-date=April 20, 2021|archive-url=https://web.archive.org/web/20210420224246/http://www.ttc.ca/About_the_TTC/Projects/Easier_Access/Easier_Access_Schedule.jsp|url-status=live}}</ref>

Because the line opened in sections from 1954, it has a relatively high number of [[Toronto subway trackage#Diamond crossovers|crossovers]], which were mostly constructed at terminal stations to turn back trains.<ref name=":0">{{Cite web|date=January 17, 2021|title=Detailed map of Toronto Underground & Tramway|url=http://cartometro.com/cartes/metro-tram-toronto/|access-date=April 8, 2021|website=Carto Metro|archive-date=April 16, 2021|archive-url=https://web.archive.org/web/20210416103424/http://cartometro.com/cartes/metro-tram-toronto/|url-status=live}}</ref> There are 17 diamond crossovers located between the service tracks along the length of the line. There are also eight [[Toronto subway trackage#Storage tracks or centre tracks|storage tracks]], which can also be used for reversals.<ref name=":0" /> The high number of possible turnbacks gives the TTC more flexibility when planning maintenance or in the event of an emergency service disruption.<ref>{{Cite web|last=Torontoist|date=May 11, 2015|title=Torontoist Explains: Subway Shutdowns|url=https://torontoist.com/2015/05/torontoist-explains-subway-shutdowns/|access-date=April 8, 2021|website=Torontoist|archive-date=April 14, 2021|archive-url=https://web.archive.org/web/20210414144415/https://torontoist.com/2015/05/torontoist-explains-subway-shutdowns/|url-status=live}}</ref>

=== Stations ===
{{see also|List of Toronto subway stations|Toronto subway public art}}
[[File:Eglinton Station Vitrolite.jpg|left|thumb|[[Eglinton station]]'s Vitrolite-tiled walls are the last such station wall treatment left in the system.]]
The original design of the oldest stations in the subway system, which are on the Yonge line (from Union to Eglinton stations), are mainly utilitarian and characterized by [[Pigmented structural glass|vitreous marble]] wall tiles and the use of the [[Toronto Subway (typeface)|Toronto Subway typeface]] for station names. Eglinton Station is the only station to retain this wall treatment, though Queen Station retains a narrow band of original blue Vitrolite tiles near the ceiling at platform level.

The design of the stations on the University line was mainly utilitarian and this style (sometimes referred to as "bathroom modern") was later used for Line 2 Bloor–Danforth as well. {{stl|TTC|Queen's Park}} and {{stl|TTC|St. Patrick}} stations have circular and semi-circular cross-sections because they are constructed in bored tunnels. Museum station was renovated in the late 2000s to have columns that resemble artifacts found in the nearby [[Royal Ontario Museum]].

{{stl|TTC|Lawrence}}, {{stl|TTC|Sheppard–Yonge}} (formerly Sheppard), and [[Finch station]]s are similar to each other in design, but have different colour schemes: Lawrence is red and cream, Sheppard is yellow and dark blue, and Finch is light grey, medium grey, and dark grey. [[York Mills station]] formerly followed the same design scheme—in light green and dark green—until it was renovated.

The section of the line between Spadina and Wilson stations (formerly the Spadina segment) opened in 1978 has art and architecture that is unique for each station, such as flower murals in [[Dupont station]] or streetcar murals in [[Eglinton West station]]. The art originally installed at {{stl|TTC|Glencairn}} and {{stl|TTC|Yorkdale}} stations had been removed, as the former's art had faded in sunlight and the latter was too costly to operate. Since late 2017, work is underway to restore the art in both stations, with Glencairn's being fully re-installed in 2020, albeit modernized.

[[North York Centre station]] is an [[infill station]]. Its design is different from the other stations in the original North Yonge extension. [[Sheppard West station]], which was opened in 1996 as Downsview station, has art and architecture that is different from the stations built earlier along its western portion of the line.

Stations on the 2017 extension from Sheppard West north to Vaughan Metropolitan Centre, in keeping with the pattern of the original Spadina line, also feature public art and architecture from notable creators. However, the platform walls have no tiles or other cladding and are simply bare concrete, though structural elements on the platforms themselves are clad, as is the case with much of the Line 4 Sheppard stations.

===Names and terminal designation===
On the Yonge portion of the line, nearly all stations located at cross streets are named after said streets, while on the University portion, they are either named for local landmarks with the cross street subtitled below (e.g. {{stl|TTC|Osgoode}} – {{em|[[Queen Street, Toronto|Queen Street]]}}) or after cross streets but with a "West" suffix for stations at streets that have counterparts along Yonge, though [[Dundas West station]] is on Line 2 Bloor–Danforth. The pattern of using landmarks as station names was exclusively used on the original (southern) section of the University branch, and the ''West'' designated street-naming convention is typically used on the former Spadina (northern) section. The two interchange stations on the University branch where it intersects Line 2 Bloor–Danforth are named {{stl|TTC|St. George}} and {{stl|TTC|Spadina}} after the north–south cross streets of Line 2, which runs below Line 1 between these stations. Due to various factors, some stations along the Spadina portion are named, formerly were named, or are proposed to be renamed using landmark or district names, albeit without subtitles: the stations at Steeles Avenue and Highway 7 (which have no corresponding stations along the Yonge branch) are respectively named "Pioneer Village" (after the nearby Black Creek Pioneer Village, which has since been renamed [[the Village at Black Creek]]) and "Vaughan Metropolitan Centre" (after [[Vaughan Metropolitan Centre|Vaughan's new downtown core]], based on the precedent set by {{stl|TTC|North York Centre}} and {{stl|TTC|Scarborough Centre}} stations). {{stl|TTC|Sheppard West}} was originally called "Downsview" but was renamed in 2017 to avoid confusion with the adjacent new {{stl|TTC|Downsview Park}} station, and {{stl|TTC|Eglinton West}} will be renamed "Cedarvale" (after [[Humewood–Cedarvale|the Cedarvale neighbourhood]] to the south) when it becomes an interchange station with the opening of [[Line 5 Eglinton]].<ref name="CityNews-2023-05-16">{{Cite web |first=Michael |last=Ranger |url=https://toronto.citynews.ca/2023/05/16/eglinton-crosstown-metrolinx-ttc-crosslinx/ |title=Eglinton Crosstown won't open until 2024, construction group to take legal action: Metrolinx |website=CityNews |date=May 16, 2023 |access-date=May 16, 2023 |archive-date=May 16, 2023 |archive-url=https://web.archive.org/web/20230516163903/https://toronto.citynews.ca/2023/05/16/eglinton-crosstown-metrolinx-ttc-crosslinx/ |url-status=live }}</ref>

As a result of the [[George Floyd protests in Canada|George Floyd protests]], Toronto City Council indicated in 2020 that they intended to rename Dundas station because its namesake, [[Henry Dundas, 1st Viscount Melville|Henry Dundas]], delayed the [[British Empire]]'s abolition of slavery in the 1700s.<ref>{{cite web |title=Toronto City Council approves "Sankofa Square" as new name for Yonge-Dundas Square and initiates plans to rename other City assets that include the name Dundas |date=December 14, 2023 |url=https://www.toronto.ca/news/toronto-city-council-approves-sankofa-square-as-new-name-for-yonge-dundas-square-and-initiates-plans-to-rename-other-city-assets-that-include-the-name-dundas/ |publisher=City of Toronto |access-date=December 20, 2023}}</ref><ref>{{cite news |title=Thousands sign petition to rename Dundas Street, named for politician who delayed abolition of slavery |url=https://www.cbc.ca/news/canada/toronto/dundas-street-renaming-petition-1.5606540 |access-date=December 20, 2023 |work=CBC News |date=June 10, 2020}}</ref> {{As of|2025}}, however, the Dundas name has yet to be changed.

[[File:TTC Line1 WallDestinationSign.jpg|thumb|right|Platform wall sign in {{stl|TTC|Downsview Park}} indicating {{stl|TTC|Union}} as a terminal station]]
Southbound station platform signage on both branches indicates {{stl|TTC|Union}} as a terminal station due to it being located at the southernmost point of the line's rough 'U' shape, where it turns northward when travelling along either branch. The train destination signs display the northwestern terminal station as "Vaughan" rather than its full name, Vaughan Metropolitan Centre, for brevity. Until the 1990s, train destination signs read "VIA DOWNTOWN" after the terminal station name.<ref>{{cite web |url=https://transittoronto.ca/photos/images/ttc-yorkdale-nb-19780630.jpg |work=Transit Toronto |title=Yorkdale: ''Yorkdale Station Image Archive'' |access-date=April 25, 2018 |archive-date=October 16, 2022 |archive-url=https://web.archive.org/web/20221016172439/https://transittoronto.ca/photos/images/ttc-yorkdale-nb-19780630.jpg |url-status=live }}</ref>