There are various criminal charges for operating a motorized, electric, or otherwise-powered transportation device on public roadways or waterways while under the influence of or intoxicated by drugs or alcohol, as defined by state law. DUI, DWI, OUI, OWI, and BUI—driving under the influence, driving while intoxicated, operating under the influence, operating while intoxicated, and boating under the influence—are some of the common names for such impaired-driving or impaired-operating criminal offenses.

Laws regarding the definitions and names of such alcohol and drug-related driving offenses vary from state to state and are usually located in a state’s statutes—often in the penal code or criminal code.

In Washington State, driving under the influence (DUI) is a criminal offense regulated under RCW 46.61.502. The law states that a person is guilty of a DUI if they operate a motor vehicle within the state while either: (1) having an alcohol concentration of 0.08 or higher within two hours after driving as shown by analysis of the person's breath or blood, or (2) being under the influence of or affected by intoxicating liquor, marijuana, or any drug. Washington also has laws against boating under the influence (BUI), covered under RCW 79A.60.040, which prohibits operating a vessel under similar intoxication standards. Penalties for these offenses can include fines, imprisonment, license suspension, and mandatory installation of an ignition interlock device. The specific charges and penalties can vary based on the circumstances of the offense, such as the level of intoxication, prior offenses, and whether the incident resulted in injury or property damage.