Re: Cruise Control and Hydroplaning
From: Mike P.

Cruise control does not know how fast your car is moving, only how fast the wheels are spinning.

If your tires hit a slick (water, ice, snow) patch, they lose traction and start to spin faster. Your cruise control senses this increase and reacts by reducing engine RPMs in an attempt to maintain a constant rate of speed.

The claim that "... when your tires were off the road your car would accelerate to a high rate of speed..." is just not true.