They are a class of traffic calming devices used in vertical deflection for slowing motor-vehicle traffic to improve safety conditions. The variations include speed cushion, speed hump, and speed table. They allow vehicles to traverse without impediment.

• They are used in controlling the speed of the vehicles: Driving fast makes you overlook many conditions. This in turn leads to many irreparable consequences. Hence, speed breakers are required to provide complete control over speed.
• To control the frequency of accidents: Speed breakers are an effective way of reducing the frequency of accidents. They are designed to limit your speed and emphasize the overall safety of people.
• Easing traffic congestion: Speed breakers are designed to ease traffic congestion by allowing vehicles to move freely.