I can also report that no one was driving 40 km/h they were driving 50 or even 60 km/h (as a safe driver I was going with the flow of traffic). A similar thing happens on Blanshard street. No one drives 50 km/h on the north end of Blanshard they drive at 60 km/h whereas at the south end people drive 40 km/h even though the entire length of the street is posted 50 km/h. Why because capable drivers don’t drive according to speed limits they drive according to road conditions.
That is why for example in Britain when certain earnest types lowered speed limits from 30 mph to 20 mph traffic accident rates increased. This was at the same time that accident rates on the streets they left at 30 mph and 40 mph actually declined. See the following link: