How effective are speed humps in reducing speeding on local roads?

Speed humps are highly effective in reducing speeding on local roads. They force drivers to slow down, enhancing road safety and protecting pedestrians. Studies show that speed humps can decrease average speeds by 10-15 km/h, significantly lowering accident rates. However, their effectiveness relies on proper placement, spacing, and design. Overall, speed humps are a proven traffic calming measure for controlling excessive speed in residential areas.