27 . If you are driving a vehicle and are 21 years old or older, you are considered to be driving under the influence when your blood alcohol concentration (BAC) is:
40 . Hydroplaning occurs when tires ride on a thin film of water instead of on the surface of the road. To prevent hydroplaning in rainy weather, you should:
Put on your cruise control to maintain a constant speed.
Decrease your speed.
Move to the shoulder of the road as soon as it starts to rain.