UP Express says train service has resumed after an signal problem suspended service for much of Friday morning.

Metrolinx announced on Tuesday that the so-called Discounted Double Fare program will end on March 31.

After almost a century of utilizing a complex system of manually controlled levers to operate the switches and signals for tracks at Union Station, Metrolinx staff say a computerized system is now needed for future growth.

Toronto is under an extreme cold weather alert as frigid temperatures persist for a third straight day.

There were delays on GO Transit's Lakeshore East line while rail service on the UP Express line was cancelled Wednesday evening.

Police are asking for the public's help in locating a woman who was last seen at Toronto's Union Station on Oct. 1.

Lakeshore West, Lakeshore East, and Barrie Go lines will all be impacted by the upgrades starting the weekend of Sept. 8-9. 

GO Transit is expanding train service on the Lakeshore corridor and the Union Pearson Express beginning next month.

GO buses replaced the UP Express while a signal system was repaired.

The co-fare discount is expected to take effect by the end of the year.