Yes. Massachusetts uses "OUI" (Operating Under the Influence) as the statutory term under M.G.L. c. 90, § 24, while most of the country uses "DUI" (Driving Under the Influence) or "DWI" (Driving While Intoxicated). The conduct covered is identical: operating a motor vehicle on a public way while impaired by alcohol or drugs, or with a BAC of .08 or higher. When you search for a Massachusetts DUI lawyer, you are looking for an OUI defense lawyer in legal terms. The Commonwealth also recognizes "OUI-Liquor," "OUI-Drugs," and "OUI-Marijuana" as distinct charges under the same statute. Practically, court paperwork, police reports, and the RMV will all use "OUI," but the defense strategy and penalty structure are the same as a DUI in any other state.