The sibling thread said traffic/criminal, which typically means one of two things... reckless driving (excessive speed or other dangerous driving) OR DUI/drunk-driving.

Reckless can often be pled down to a non-criminal, or if not, is usually a punishment as you describe.

DUI is quite a bit more serious.

Either way, typically a legal practice that handles one will handle the other. And in both cases, you will need legal counsel, as failure to do so can result in jail time.