Typically part of the sentence is to require an ignition interlock for multiple years. Driving a car without an ignition interlock is a lifetime driving ban, pl

Typically part of the sentence is to require an ignition interlock for multiple years. Driving a car without an ignition interlock is a lifetime driving ban, plus up to two additional years in prison. The details vary by state The plate is there to shame the driver primarily and dissuade them from DUI, secondarily so the police pay more attention to them.