In case you are unfamiliar with the difference between speed humps and speed bumps, I have included a picture and description of a speed hump. "Where speed bumps are aggressive in slowing down traffic, speed humps are more forgiving. They are usually not as high as a speed bump and are longer. This makes it a good option to slow street traffic to a safe speed. Speed humps can be driven over at a speed of 15 to 20 mph. Speed humps are perfect to slow down traffic in school zones, as well as residential roads."
For a more detailed comparison go to: https://www.trafficsafetywarehouse.com/Resources/speed-bumps-vs-speed-humps.asp