© Sara-Christine Gemson/CBCMany people were left stranded for more than an hour during the shutdown. Shuttle buses were not running during the service outage.
Toronto Transit Commission officials say a
power failure the night before caused an "unacceptable" communications issue that left the city's entire subway system at a standstill.
Between 125,000 and 150,000 people were affected by the "communication issues" during morning rush hour, officials estimated.
TTC Chair Josh Colle called the shutdown "unacceptable."
"The total shutdown of our subway system this morning, for approximately 90 minutes, was extremely frustrating for everyone," he told reporters on Monday.
"It is deeply troubling that our system can experience such a major technical failure. This needs to be dealt with immediately."
On Monday afternoon, the TTC said in a statement that a
power outage at the Hillcrest complex was to blame for the issues.
The complex, which houses the control centre, experienced a power failure on Sunday evening that activated the uninterrupted power supply.
A failure in the system caused its battery to drain, keeping power from getting to the communications system. Crews are still investigating why the uninterrupted power supply system failed."Once that is determined, the TTC can implement remedies, as required, to prevent a recurrence."
TTC CEO Andy Byford spoke with reporters Monday afternoon, saying he is "very disappointed with what happened this morning."
Comment: Also in Canada, a major power outage was reported in downtown Vancouver yesterday.
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