Intersection going South towards Kingston on 38, only dangerous if you're trying to enter the 401 East. The problem is that if you are at that intersection, there are two lanes of traffic coming at you and a lot of large vehicles (SUVs, Trucks, Vans) headed North to catch the 401 West. So you look and see that you have time to enter the East Onramp, and find a speeding vehicle headed North in the right-hand lane bearing down on you as it passes the slower vehicle.
I almost was clipped by a cop doing at least 150km/h headed North with no lights or sirens on three years ago. Very nearly rang my bell for the final time, I'd say no more than one second difference and it would have been a bad scene.