To conduct an arrest for DUID or DUI, the arresting officer must establish reasonable suspicion to stop a suspected impaired driver. This could include swerving, weaving, driving erratically, driving suspiciously slowly and impeding the flow of traffic, or committing a moving violation. Once officers establish reasonable suspicion, they may conduct a stop. If they determine there is probable cause to believe the driver is under the influence of drugs or alcohol, the officer will arrest the driver.