Arizona Drivers License Practice Test

Passing on the right is allowed when driving on an open highway marked for multiple lanes. This is because, in such scenarios, there are designated lanes that facilitate safe movement of vehicles traveling in the same direction. When lanes are clearly organized and there is enough space, it provides a legal and safe opportunity to pass slower vehicles on the right side. In contrast, other scenarios mentioned involve circumstances that either pose risks or are explicitly illegal. For instance, signaling a right turn indicates that the other driver intends to change lanes or turn, which means passing at that moment could be dangerous. Passing in a no-passing zone is prohibited due to safety concerns, as there may be visibility restrictions or upcoming intersections. Finally, approaching a stop sign involves a scenario where vehicles are expected to stop, and passing would not be safe or appropriate. Thus, the correct answer reflects the rules governing lane usage in multiple-lane settings where passing on the right is permissible.