Editing Line 3 Scarborough (section)

=== Closure ===
On July 24, 2023, the last car of a train on Line 3 Scarborough derailed south of Ellesmere station. There were 45 people on board, with five injuries reported.<ref name="CityNews-2023-07-25">{{Cite web |last=Casaletto |first=Lucas |date=July 25, 2023 |title=TTC's Line 3 shut down after train derailment; multiple passengers injured |url=https://toronto.citynews.ca/2023/07/24/passengers-injured-after-ttc-train-derails-in-scarborough-line-3-srt/ |access-date=July 30, 2023 |website=toronto.citynews.ca}}</ref> The TTC closed the line while the cause of the incident was being investigated. Although the investigation and closure was expected to last several weeks, the city accelerated work to support the replacement buses.<ref name="TheStar-2023-07-27" /><ref name="TheStar-2023-08-17">{{cite news |last=Harvey |first=Lex |date=August 17, 2023 |title=TTC hunts for Scarborough solutions as RT remains out of service |newspaper=[[Toronto Star]] |url=https://www.thestar.com/news/gta/it-s-going-to-happen-ttc-hunts-for-scarborough-solutions-as-rt-remains-out-of/article_64f97ed6-e14a-5aa3-b62c-316d240459f5.html}}</ref> On August 24, 2023, the TTC announced that the line would not reopen.<ref name="confirmed closed" /> In late September 2023, the TTC explained that bolts that held the linear induction rail to the roadbed had come loose in the July incident, causing the magnetically attracted induction rail to rise up, strike and derail the last car of the train.<ref name="TheStar-2023-09-26">{{cite news |url=https://www.thestar.com/news/gta/ttc-ceo-says-further-transit-closures-possible-after-derailment-of-ageing-srt/article_f79ea6f4-a3be-565d-a63d-be11ed39df87.html |title=TTC CEO says further transit closures possible after derailment of ageing SRT |newspaper=[[Toronto Star]] |date=September 26, 2023}}</ref> 

Immediately following the derailment, [[#Replacement bus service|replacement bus service]] was implemented initially by shuttle buses serving the closed stations along Line 3. On September 3, 2023, the TTC replaced the shuttle bus service with route 903 Kennedy–Scarborough Centre Express, running northbound on Kennedy Road and southbound on Midland Avenue in reserved lanes between Kennedy and Scarborough Centre stations. Unlike the shuttle service, route 903 did not serve the closed Lawrence East, Ellesmere, Midland and McCowan stations.<ref name="TTC-SRT-Future">{{cite web |url=https://www.ttc.ca/about-the-ttc/projects-and-plans/Future-of-Line-3-Scarborough |title=The future of TTC's Line 3 Scarborough (SRT) |publisher=[[Toronto Transit Commission]] |date=September 3, 2023 |access-date=September 1, 2023 |archive-url=https://web.archive.org/web/20230901021026/https://www.ttc.ca/about-the-ttc/projects-and-plans/Future-of-Line-3-Scarborough | archive-date=September 1, 2023}}</ref> On November 19, 2023, the TTC extended eight bus routes from Scarborough Centre to Kennedy station, eliminating the need to transfer to route 903 at Scarborough Centre station.<ref name="TTC-bus-replacement" /> 

On November 30, 2023, the consulting firm [[Systra]] submitted a report to the TTC that found that, prior to the derailment, maintenance procedures on Line 3 were weak or non-existent and that track inspection staff lacked experience to understand how various defects could create an operating risk.<ref name="TheStar-2024-02-22">{{cite news |url=https://www.thestar.com/news/gta/alarming-reports-raise-questions-about-state-of-scarborough-rt-before-crash/article_a2b8a296-d050-11ee-99b4-179020872c36.html |title='Alarming' reports raise questions about state of Scarborough RT before crash |newspaper=[[Toronto Star]] |date=February 22, 2024}}</ref>

On October 4, 2024, [[EllisDon]] began work to demolish and remove the Line 3 train tracks between Eglinton Avenue and the north end of Ellesmere station in preparation for constructing a busway.<ref name="TTC-CEO-2024-10">{{cite web |url=https://cdn.ttc.ca/-/media/Project/TTC/DevProto/Documents/Home/Public-Meetings/Board/2024/October-29/1_CEO_Report_October_2024.pdf |title=Chief Executive Officer's Report – October 2024 |publisher=[[Toronto Transit Commission]] |date=October 29, 2024 |page=9 |archive-url=https://archive.today/20241023235111/https://cdn.ttc.ca/-/media/Project/TTC/DevProto/Documents/Home/Public-Meetings/Board/2024/October-29/1_CEO_Report_October_2024.pdf | archive-date=October 23, 2024 |url-status=live }}</ref>