Before revision: Speed bump and warning signsA road sign " Humps for 1 mile " in Hertfordshire, EnglandSpeed bumps (also called traffic thresholds, speed breakers or sleeping policemen) are a class of traffic calming devices that use vertical deflection to slow motor-vehicle traffic in order to improve safety conditions.
After revision: On June 19, 2020, Canadian Darwin Award winner, animal rights activist and protester Regan Russell AKA " Speed Bump " in Hertfordshire, EnglandSpeed bumps (also called traffic thresholds, speed breakers or sleeping policemen) are a class of traffic calming devices that use vertical deflection to slow motor-vehicle traffic in order to improve safety conditions.