Is it the TTC that is demanding their drivers go slow, or is it the Labour Union representing the drivers? I can see the Union arguing with the TTC that they can't force their members/drivers to go faster because their entitled to a safe work environment.
Where does this mandate to "go slow" come from? I was just in London where the Underground trains appear to travel faster. I'm sure there is a culture of safety at the TfL, and within the Union representing their drivers. But not to the point of slowing down trains like we see in Toronto.
Also, most stations in London don't have platform screen doors, and yet the trains don't travel slowly into the stations.