Northbound University Avenue between Armoury Street and College Street is reduced to one lane until spring 2027 while Toronto replaces two century-old watermains, with southbound lanes unaffected.
Northbound traffic on University Avenue in downtown Toronto will be reduced to a single lane between Armoury Street and College Street until the spring of 2027, the City of Toronto says.
The closures for a critical infrastructure project began today. Southbound lanes will not be affected. The city announced the work in a news release, describing the project as necessary to ensure reliable long-term water service and to provide safety improvements supporting the area's major health-care, institutional and commercial facilities. According to the city, the work will replace two watermains that are more than 100 years old.

Construction Ensures Long-term Water Reliability
The release said the replacements will help ensure Toronto's hospitals and health-care facilities continue to have the reliable infrastructure they depend on to serve patients, staff and visitors for decades to come. Construction hours will run from 7 a.m. to 11 p.m. from Monday to Friday, with work also taking place on weekends as needed. The city said the schedule was planned to limit disruption while completing the upgrades.
The city said it has worked closely with health-care providers, emergency services and other partners to carefully plan the work and minimize impacts wherever possible. Maintaining access to hospitals and health-care facilities has been a key consideration throughout project planning, the release stated. Emergency access, along with access for patients, visitors and workers, will be preserved at all times, according to the city. Officials said those access routes remain a priority for every stage of the project.
A number of traffic management measures will be implemented to keep people and vehicles moving through the busy downtown health-care district. Those measures include traffic agents, paid duty officers, temporary signage and signal timing adjustments. The city warned that motorists should expect travel delays in the area and are encouraged to plan ahead.
Drivers Urged to Seek Alternative Routes
Drivers who regularly use University Avenue, or who travel through the downtown health-care district, are asked to consider adjusting travel times, using alternative routes or taking public transit where possible. The project affects a key stretch of one of downtown Toronto's main north-south corridors, running past major hospitals and institutional buildings. With northbound traffic limited to one lane, the city expects congestion to build in and around the area during peak periods.
The closures are expected to remain in place for several months, with northbound lanes not returning to normal until the spring of 2027. The city said updates will be provided as the work progresses, and it urged residents and commuters to allow extra time for trips through the corridor.
This story was compiled and edited by the HeadTopics newsroom and HT AI from the reports above.
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