Judge gives Amanda Bynes some driving tips

Amanda Bynes had better watch her back ... on the road.

The troubled starlet - who has time and time again been slapped with DUI and other driving-related charges, and last week was photographed allegedly smoking pot while behind the wheel - won't get off so easy if she makes another mistake.

The judge in Bynes' spring DUI case said Wednesday that the actress, whose driver's license is suspended, had better not drive again until her license is reinstated, according to TMZ.com.

And if she does? She can expect the court to impose a high bail - right now, the starlet is out of jail on her own recognizance.

In addition to driving-related troubles, the 26-year-old has been engaging in some pretty bizarre behavior as of late. On Monday, a "disoriented" Bynes reportedly barricaded herself inside a clothing store dressing room for two hours, TMZ reported.