How does the cruise control on a car maintain the same speed while going downhill?

Question

Example: I was going down a steep hill yesterday with my cruise set at 60 MPH and the car stayed at that exact speed the whole time.

Answer 1

It lets up on the fuel an used engine drag to slow the car down. Depending on the grade of the hill, it may not keep you at the same speed. I know some hills in Summersville WV (speed trap capital of the USA) where cruise control won't keep you under the posted limit even if you set it there.

Answer 2

Thats what its for,,keeping from getting a ticket
pretty cool huh?,,,I love mine

It reduces the fuel imput,a computer thing