Push-to-pass

The Überholknopf is a mechanism for a race car, which the driver has the possibility to increase the performance for short periods of time. In general, the knob on the steering wheel. The system was developed to facilitate overtaking and thus thereby make motorsport exciting ..

Several racing series use a Überholknopf, including Formula 1, Champ Car, A1GP, and the IndyCar Series.

It is not necessary that the system is only used when a driver is trying to overtake another car. For example, a driver can use the button to defend its position. The amount of additional power, the length of time at which it is applied and the number of uses during a race will depend upon the particular racing series.

In Formula 1 KERS system works in a similar manner. The Drag Reduction System, or DRS, however, increases the acceleration and top speed by opening a portion of the rear wing.