Electronic stability control [If you start into a curve too fast or for some other reason start to lose control electronic stability control can help avoid disaster].

This article reviews the effectiveness of electronic stability control (ESC) in reducing the number of fatal collisions in the USA. Equipping cars and sport utility vehicles with ESC can reduce the risk of involvement in single-vehicle fatal crashes by more than half. The effect on single-vehicle crashes overall was about forty per cent and the effect on multiple-vehicle crashes was much less. ESC uses speed sensors on each wheel and the ability to brake individual wheels in combination with a steering angle sensor, a rotation rate sensor, and a control unit. The appropriate wheel is braked when the sensors detect over- or under-steering, to help the driver maintain control. In many cases the engine throttle is also reduced. An increasing number of manufacturers are fitting ESC to new models.