An Aggravated DUI, DWI, OUI, or OWI (driving under the influence, driving while intoxicated, operating under the influence, or operating while intoxicated) is the criminal offense of DUI/DWI/OUI/OWI—with additional aggravating circumstances that enhance or make the offense a greater crime—resulting in greater potential punishments.

Aggravating circumstances that may result in an Aggravated DUI/DWI/OUI/OWI charge include (1) a blood alcohol concentration (BAC) that is significantly higher than the legal limit; (2) an accident in which a person is injured or killed, or in which there is property damage; (3) a minor child in the car being transported by the alleged intoxicated driver; (4) driving 20 mph or more over the speed limit; (5) the driver is under the legal age for drinking (generally 21); (6) refusing to submit to a chemical test of blood, breath, or urine; and (7) prior convictions for DUI/DWI/OUI/OWI.

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

In Connecticut, an Aggravated DUI (also known as an Aggravated DWI, OUI, or OWI) is a more serious offense than a standard DUI due to certain aggravating circumstances. These circumstances can include having a BAC significantly above the .08% legal limit, causing an accident resulting in injury, death, or property damage, having a minor in the vehicle, speeding excessively, being underage, refusing a chemical test, or having prior DUI convictions. Connecticut law, specifically under Title 14 Sec. 14-227a of the Connecticut General Statutes, outlines the penalties for DUI offenses, which are enhanced in the presence of these aggravating factors. Penalties can include longer jail sentences, higher fines, longer license suspensions, and mandatory use of ignition interlock devices. The state takes these factors into account when prosecuting DUI cases, and they contribute to the severity of the charges and punishments imposed.