After reading the article on the vehicle leaping over the roundabout in Qualicum Beach it became abundantly clear that people need help in their decision making while operating a vehicle.
Some years ago I spent some time in Mexico driving over the entirety of their great land. The most effective way to slow vehicles down was, in some cases, a log across the road.
The key was to have it the correct size so that the vehicle never left the road but you got a bruised head from the ceiling. Sometimes, there were signs to alert you to the potential speed controller, other times not so much. Ditches seemed to have a certain flare in some parts.
The beauty of all these devices was they were inexpensive and drivers learned to pay attention or ignore at their own peril. You don’t need policeman to enforce speed limitations and waste their time and resources, simply install speed bumps. Should the four-inch one in front of the school not be sufficient, make it six inches. Eventually everyone will get with the plan.
Initially, to be kind, signage could be placed to denote the potential of vehicular harm, but it would not be necessary. For those that have concerns around playgrounds and schools, simply demand speed bumps.