Driving under the influence

1937 poster warning American drivers against drunk driving

Driving under the influence (DUI) or driving while intoxicated (DWI) is the crime of driving, operating, or being in control of a vehicle while one is impaired from doing so safely by the effect of either alcohol (see drunk driving) or some other drug, whether recreational or prescription (see drug-impaired driving). Multiple other terms are used for the offense in various jurisdictions.