If you have an arrest record, it is possible to have it expunged and removed from your record. As long as you were not convicted or if you completed a Pre-trial Intervention Program (and 6 months have elapsed), then it may be possible for you to have your record expunged.
Similarly to the misdemeanor and felony requirements for expungement, you cannot expunge a DUI or Driving Under the Influence, motor vehicle violation, or any crime that is listed in the felony expungement page.
It normally takes about 5 to 6 months for an expungement proceeding to complete, although this varies significantly based on the court.