Getting to Pearson

[danbrotherston]

Yes, and that's a great argument for transit of some type, because they have dispatching and stuff, but it's still possible to be on the road between exits when a collision completely shuts the highway.  I've been there, sat for hours in the middle of the 401 before police re-opened.  Fortunately I was returning home, and didn't miss a flight, but it could still happen.

Can be alerted to this with waze or the radio, it's likely how they found out

Generally they have radio contact with dispatchers and other vehicles and have enough vehicles on the road to have a network of eyes.