A major winter storm that blanketed the GTA Tuesday night made for a slower-than-usual morning commute. 

Heavy snow started falling at around 7 p.m. bringing more than 20 centimetres of snow to most areas of the GTA.

As of 6:30 a.m. the city reported that all arterial roads had been plowed with salting continuing throughout the morning. Plowing of local roads will continue throughout the day. 

Commuters who spoke to CBC News this morning said most roads were in good shape, though the drive in was slower than usual. 

Heavy snow blankets Toronto during major March storm0:32

Toronto police Const. Clint Stibbe told CBC News there were a few collisions this morning, most outside of the city. 

"We need to make sure everybody takes their time and they can get to and from work quite safely," he said. 

School buses were cancelled in Toronto and most other parts of the GTA, but schools remained open Wednesday.

​There were no major problems on the TTC during the morning rush. 

At Pearson airport, the snow caused about 80 departing and 160 arriving flights to be cancelled Wednesday morning.

GO Transit and the UP Express, meanwhile, altered their schedules to cope with the weather.