Found the place to make u-turn up

On a narrow mountain's road a man saw a police car driving uphill backwards. - Hi guys. Why are you driving backwards? - Because we are not sure that we will find the place to make u-turn on the top of the mountain. After one hour the same man saw the same police car driving downhill backwards again. - But guys, why are you driving backwards again? - We have found the place to make u-turn up there.