Seriously though, lane narrowing is more effective at speed reduction and traffic calming than speed bumps. Both, even, are better for particularly stubborn stretches of road.

This does a much better job at reducing car speeds, and it is also vehicle size agnostic. People on SUVs feel far more threatened by narrowing lanes and will absolutely slow down. While they will plow through a speed bump because they can’t feel them with their emotional support tank’s suspension.