It’s illegal to operate a motor vehicle in Connecticut while “under the influence” of drugs or alcohol or with an “elevated” blood alcohol content (BAC). Operating “under the influence” means that the operator’s ability to drive is “affected to an appreciable degree.” An “elevated” BAC is .08% or higher for drivers 21 and over and .02% for operators under age 21.
Connecticut, like all other states, prohibits operating a motor vehicle while under the influence of drugs or alcohol. In Connecticut, an OUI (operating under the influence), sometimes called “DUI,” results in criminal and administrative penalties. Both types of penalties increase in severity if a driver has prior OUI convictions.
Sobriety checkpoints are legal in Connecticut (see 671 A.2d 834 (Conn.App.CT. 1996)). These checkpoints (also referred to as "mobile checkpoints" or "roadblocks") are police traffic stops that are not tied to any specific or individual suspicions.