depends on the country/state
In minnesota it's not illegal because DUI's have to be with 'motor vehicles'. You can't get a DUI on a bike, you can on a horse though.
Originally Posted by
dzinehaus
illegal. period. its a DUI. Check your vehicle laws / drivers handbooks which most likely recognize a bike as a road vehicle... Therefore...no matter the vehicle as long as its considered a road vehicle you can get a DUI for it.