Ontario Highway Traffic Act

Location Highway 10 South of Orangeville Ontario.
There are 5 lanes, 2 in each direction and 1 center lane.
At the point where the Highway has a decline, the speed-limit is 80km.
Still on the decline, there is a speed-limit sign "60km ahead", followed after ONLY 90m with "60km begins".
I was driving in the left lane driving around 85km with a row ...