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 Oregon, the primary offense for operating a vehicle while under the influence of intoxicants is called Driving Under the Influence of Intoxicants (DUII). This applies to motorized, electric, or otherwise-powered transportation devices on public roadways. Oregon law defines intoxication as having a blood alcohol concentration (BAC) of 0.08% or higher for drivers of non-commercial vehicles, 0.04% for commercial drivers, and any amount of alcohol for drivers under the age of 21. Additionally, the presence of controlled substances or inhalants can also result in a DUII charge. The law is codified in the Oregon Revised Statutes (ORS), specifically ORS 813.010. For waterways, Boating Under the Influence of Intoxicants (BUI) is the equivalent charge, governed by ORS 830.325. Penalties for these offenses may include fines, imprisonment, mandatory education programs, and suspension or revocation of driving privileges.