The severity of injury depends on the presence of crash-protective roadsides and the speed of impact.. It is considered that Electronic Stability Programmes can contribute to reduce some accidents including rollovers.. In Sweden one to two rollover accidents occur every day. A skilled driver may stop a rollover by stopping a turn. Stunt drivers deliberately use ramps to launch a rollover. Vehicles with a high center of gravity are easily upset or "rolled." Short of a rollover, stunt drivers may also drive the car on two wheels for some time, but this requires precise planning and expert driver control. Specialized safety equipment is often utilized. The driver deliberately drives one side of their vehicle onto a ramp which causes their vehicle to roll over. The winner is the driver who guides their vehicle to the most rolls.