An all-way stop (or four-way stop when there are four approaches to the intersection) is an intersection system used predominantly in the United States of America, Canada, and South Africa where traffic approaching it from all directions is required to stop before proceeding through the intersection. An all-way stop may have multiple approaches and may be marked with a supplemental plate stating the number of approaches.

Operation

A motorist approaching an all-way stop is always required to come to a full stop before the crosswalk or stop line. In most jurisdictions that use all-way stops, pedestrians always have priority at a crosswalk, even if the crosswalk is not delineated with pavement markings. Within some US jurisdictions, such as the state of Idaho, bicyclists are exempt from the need to make a complete stop, but must give way to other vehicles as otherwise required by law. After a full-stop has been made, vehicles usually have the right-of-way to proceed through the intersection in the order that they arrived at the intersection. In the United States, if vehicles arrive at approximately the same time, each driver must yield to the drivers on their right, while in South Africa drivers must use common sense and make eye contact and gestures. Some areas have additional formal and informal rules which may or may not include special procedures for when all stop signs are approached simultaneously.