The Electronic Stability Program ESP® is an active system which improves handling safety and stability. It contributes significantly to reducing the risk of skidding when cornering or making evasive manoeuvres. It does this in critical handling situations through targeted braking interventions at each individual wheel, for instance if the bus is reaching critical limits when cornering. At the same time the engine output is reduced, with the effect that precisely regulated braking interventions prevent the bus from skidding, as far as this is physically possible.
The ESP® monitors lateral acceleration in buses as well. If the bus should reach a critical point when negotiating a long bend - e.g. a motorway exit - or when changing lane quickly, the vehicle's speed is automatically reduced to the point where driving stability is regained. The ESP® is comparable to that used in passenger cars, but has been modified for deployment in buses.