What trips people up most is that DUI and DWI do not always mean different things. In many states, the labels are used interchangeably for impaired driving offenses, while in others one may signal a different level of intoxication, a drug-related case, or a separate charge entirely. Broadly, both terms refer to driving while affected by alcohol, drugs, or another intoxicating substance to a degree that makes safe driving harder or impossible.

The difference matters because the exact label controls what police, prosecutors, insurers, and courts are talking about. It can affect the elements the state must prove, the penalties, whether a chemical test result is central, and how a defense is built. In a crash case, an impaired-driving charge can also shape a related injury claim by supporting arguments about negligence, liability, and sometimes punitive damages.

In Hawaii, the usual charge is not called DUI or DWI at all. State law uses Operating a Vehicle Under the Influence of an Intoxicant (OVUII) under Hawaii Revised Statutes § 291E-61 (2024). A driver can be charged for being impaired or for having a blood alcohol concentration of 0.08% or more. After a serious wreck, including one on steep roads such as Likelike Highway, that distinction can affect both the criminal case and any civil claim for medical bills, lost income, and pain and suffering.