UP Express says train service has resumed after an signal problem suspended service for much of Friday morning.
At around 11:30 a.m., UP Express tweeted that service was back up and running.
Signal issues began affecting UP Express sometime early Friday morning, Metrolinx spokesperson Nitish Bissonauth said.
“We know it’s cold and are sorry for the inconvenience,” Bissonauth said, adding that crews were working hard to resolve the issue as soon as possible.
There were also delays of about 30 minutes on the Kitchener line as a result of the signal issue.
Riders travelling to and from Toronto’s Pearson Airport and Union Station were told to access a GO shuttle bus. Bissonauth said replacement buses were running every 15 minutes with staff on site to guide customers to an area where the reserve buses will pick up passengers.
Those near Weston and Bloor stations were told to make their way to the nearest TTC subway station, Metrolinx said.