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 Wyoming (WY), the primary offense for operating a vehicle while under the influence of alcohol or drugs is Driving Under the Influence (DUI). Wyoming Statute § 31-5-233 outlines the prohibition against driving or being in actual physical control of a motor vehicle while under the influence of alcohol or a controlled substance, or with a blood alcohol concentration (BAC) of 0.08% or higher. Penalties for DUI in Wyoming can include fines, imprisonment, license suspension, and mandatory substance abuse assessment and education. Wyoming also has an Implied Consent law, which means that by driving in the state, drivers consent to submit to chemical testing if suspected of DUI. Refusal to submit to testing can result in license suspension. For boating, Wyoming has Boating Under the Influence (BUI) laws, which apply to operating watercraft while intoxicated. The state's BUI laws are similar to DUI laws and carry penalties that may include fines, jail time, and boating license suspensions.