Something happens that the driver has to make a maneuver that starts as a loss of control and then results in a rollover," [Fred Andersky] says. "The ESP system helps mitigate loss of control in those situations and goes a step further, and in slide-skid jackknife situations, this helps as well. A roll-only system doesn't have that yaw rate sensor and steer angle sensor to figure out what's going on, so it can't help.
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