Ontario Highway Traffic Act

I had a strange incident today on my way to work involving a school bus

Driving in a 40-50 kmph zone, cant remember exact.
I was driving north on a 2 lane street at the speed limit, on the left lane but 1-2 car lengths behind a school-bus, which was on the right lane.

The bus turned on its flashing lights as it was slowing down to stop.
By the ...