Updated May 5, 2025 at 12:50pm:
The TTC now has a web page with details of the changes for the first phase of the construction and diversions. This includes a map showing the diversions to west of Bathurst rather than just downtown. I have added this in the body of the article.
May 5, 2025 at 1:40pm:
Information about the 304 King and 303 Kingston Road night services has been added.
May 5, 2025 at 1:55pm:
The TTC has confirmed that overhead upgrades on King Street East and on Sumach/River will be completed before the King/Church track work end, and streetcar service will resume in September.
May 5, 2025 at 4:30pm:
I asked the City if it thought the intersections used by diverting streetcars and buses could handle the volume of traffic. They replied, but didn’t add much. See the end of the article for the exchange.
Major changes are coming to downtown streetcar routes on May 11 with the next schedule change. This will accommodate a combination of water main replacement, track reconstruction and streetcar overhead upgrades mainly at King and Church. Work is expected to require diversions until the October schedule change on Thanksgiving weekend. Streetcar service is expected to return with the September schedule change on Labour Day weekend.
The effects of work an King and Church have been known for some time through the Annual Service Plan and through a City report on the project. (The original report and recommendations were amended at the recent Council meeting to lessen the effect of various proposed lane closures.) Service levels have been published via the electronic version of schedules used by trip planning apps. The information about vehicles/hour at various locations is taken from those schedules.
(As an aside, the TTC website has still not been updated to include the 2025 Service Plan even though it was approved by the Board in January.)
With the concentration of transit service through various intersections, and the added complexity that most vehicles will make turns at these locations, there simply will not be enough capacity even under ideal conditions. It is no secret that “ideal” is a word rarely appropriate for transit operations downtown thanks to the lack of robust traffic management and real transit priority.
In past years, the diversion of services from King Street around the TIFF street fair created problems for transit travel times and reliability, but this lasted for a brief period. The planned diversions for King/Church will last through the summer.
Many of the water mains in the “old” city have been in service for over a century. Other parts of King Street have seen renewal, occasionally on an emergency basis following a break and sink hole.
The special trackwork at the King/Church intersection has been in bad shape for some time, and was overdue for replacement. Previous reconstructions were in 1983 and 2003. Other competing construction projects got in the way, and the track conditions have worsened year by year. There are many patches, and a well-deserved slow order unlike the standing practice even at freshly rebuilt junctions.
This intersection is also old enough that it predates the era of panel track construction where pre-welded sections are trucked in and assembled on site. This replaced the older style of tracks assembled piece-by-piece and often not welded robustly if at all. TTC has not yet been through its entire inventory of “old” track given the 20-30 year cycle depending on the level of service, wear, and disintegration at intersections.
Other work planned for this period of suspended streetcar service is the reconstruction of overhead on King and on the Distillery branch for pantograph-only operation.
Closing King & Church for an extended period concurrently with the Ontario Line construction at Queen & Yonge will add to the traffic snarls downtown. The City talks about using Traffic Agents to manage key intersections, but whether they provide enough people at enough places at enough times remains to be seen.
Routes Diverting off of King Street
Three routes are affected: 504 King, 503 Kingston Road and 508 Lake Shore.
The 504 King service will be broken into three sections:
- A 504 streetcar service between Broadview to Dundas West Stations operating via the same route as 501 Queen between the Don Bridge and Spadina.
- A 504C bus shuttle from Wolseley Loop south on Bathurst and east on King terminating at Broadview & Gerrard.
- A 504D bus shuttle from Wolseley Loop south on Bathurst, east on King and south on Sumach to Front & Cherry. Buses will loop via [to be announced] and will not serve Distillery Loop.
The 503 Kingston Road service will be changed so that its western terminus shifts from York Street to Dufferin Loop. Cars will follow the same route as the 504 King via Queen from the Don Bridge to Spadina, then shift south onto King to follow the pre-diversion 504B route to Dufferin.
508 Lake Shore cars will follow the same route as 504 King.
Night Service Changes
- The 304 King night car will operate every 20 minutes over the same route as the daytime 504 service diverting via Queen and Spadina.
- A 304D night bus will run every half-hour over the same route as the 504D bus from Wolseley Loop to Broadview & Gerrard.
- The 303 Kingston Road night car will operate every 20 minutes over the same diversion route as the 304 King night car, and will operate as it does now to Sunnyside.
The maps below are from the City Report about this project originally published in February. An updated map for the first phase has been added later in the article.

For part of the construction period, King/Church will be impassible even to the replacement bus service and it will divert south to Wellington and Front.

These maps do not tell the whole story because another set of construction diversions will overlap the King/Church changes until the next schedule change in late June.
Although water main work at Bathurst/Fleet/Lakeshore is now complete, track work continues there and on Bathurst Street further north. 511 Bathurst streetcars will continue to divert east via King to Spadina looping via Adelaide and Charlotte. The 511B shuttle bus will be shortened from Wolseley Loop at Queen to an on-street loop via King, Portland and Richmond to Bathurst Street.
509 shuttle buses continue operating between Exhibition Loop and Queens Quay Loop at Spadina. 510 streetcars continue operating to Union Station.
The combined effect of the diversions will be greater than during the total meltdown of King service in 2024 when all cars diverted north via Church to Queen because volumes of other routes (510 Spadina, 511 Bathurst and 501 Queen) will be added to the King services, and more intersections will be affected over a wider area.
Updated May 5, 2025 at 12:50pm:
The TTC’s project webpage has a consolidated map of the diversions for the first phase of the work.


















