Which traffic violation can result in an automatic suspension of driving privileges in Arizona?

The violation that can result in an automatic suspension of driving privileges in Arizona is driving under suspension or revocation. This is a serious offense because it involves operating a vehicle when one's driving privileges have already been taken away due to previous violations or legal repercussions. The law treats this as a significant breach of regulations since it indicates a disregard for the legal conditions set forth for licensed drivers. As such, the penalties for this action can be severe, including further suspension, fines, and even potential jail time.

In contrast, the other options do not necessarily carry an automatic suspension of driving privileges. For instance, while speeding in a school zone, driving without a license, and running a red light may lead to fines or points on one's driving record, these violations do not result in an automatic suspension like driving under suspension or revocation does. Each choice may carry its own set of consequences, but the key distinguishing factor for automatic suspension is specifically linked to operating a vehicle when one is already prohibited from doing so.