This guide is for general information only and is not legal advice. Laws change — verify current rules with your state DOT or a licensed attorney before relying on this for any legal matter. Read full disclaimer.
The rule
In Mississippi, the standard DUI statute applies to bicyclists. Mississippi's DUI statute (Miss. Code § 63-11-30) applies to anyone operating a 'vehicle.' Miss. Code § 63-3-1303 makes every bicycle rider subject to all duties applicable to the driver of a vehicle when on a roadway. The first-offense penalty mirrors the motor-vehicle DUI: fine up to $1,000, possible jail, and a driver-licence suspension that applies even though no motor vehicle was involved. See Miss. Code § 63-11-30 (Operating a vehicle under the influence).
Riding a bicycle while impaired is a real legal exposure in Mississippi. If you've been drinking, the safer move is to walk your bike, take transit, or call a ride.