While I do not practice in your State, I can say that DWI and DUI offenses are under the motor vehicle codes of each state. (Some states, make these offenses both motor vehicle and criminal).
Expungement statutes are specific to each state, and enumerate what can and cannot be expunged in that state. In NJ, the expungement statute specifically excludes the driver license record from being expunged. The fastest way for you to check whether your state bars the expungement of your driving record, is to check your state expungement statute. Alternatively, I recommend that you talk to an experienced criminal defense lawyer in your state.