Section 148-7 of the Ontario Highway Traffic Act offers up this requirement:
Where one vehicle is met or overtaken by another, if by reason of the weight of the load on either of the vehicles so meeting or on the vehicle so overtaken the driver finds it impracticable to turn out, he or she shall immediately stop, and, if necessary for the safety of the other vehicle and if required so to do, he or she shall assist the person in charge thereof to pass without damage.
I cite this as proof that drivers people (and the law) used to be civilized. I’m sure this clause had application at some point in our distant past, but it seems quaint and head-pattingly naive to suggest that someone today would get out of his car and help another driver to pass him. Unless flipping the bird and shouting out the window could be considered “assistance” in this context.