Hydroplaning: Question Hydroplaning: Answers Only occurs at extremely high speeds. Can occur at speeds as slow as 30 mph. Happens most frequently when tire pressure is too high. Happens most frequently when tires have good tread. Explanation If there is enough water on the road, hydroplaning can occur at speeds as low as 30 mph. It is most likely if the tires' air pressure is too low or if tires' tread is worn. This questions appears in the following tests: Florida Tank Georgia Class B Knowledge Test Mississippi Passenger Montana Class A Knowledge Test New York Class B Knowledge Test North Carolina Passenger South Carolina Class B Knowledge Test Texas Tank
