Bump Drafting

Bump Drafting is a racing technique where one car deliberately makes light contact with the rear bumper of another car to push it forward, helping both vehicles gain speed.

This maneuver is most commonly seen in NASCAR racing, particularly on high-speed oval tracks like Daytona and Talladega. The trailing car uses the aerodynamic advantage of drafting (following closely behind) and then adds a gentle bump to transfer momentum to the lead car, allowing both to travel faster than they could individually.

While bump drafting can provide a significant speed advantage, it requires skill and coordination between drivers. If performed incorrectly, it can cause the lead car to lose control, potentially resulting in serious accidents. For safety reasons, it's regulated or restricted in many racing series.