Describe what to do at a four-way stop.

At a four-way stop, the proper procedure is to yield to any vehicle that arrives first. This rule is essential for ensuring smooth and safe traffic flow at intersections where multiple vehicles may arrive simultaneously. The principle behind yielding to the first vehicle is based on establishing an order of precedence. The first vehicle to reach the intersection has the right of way, allowing it to proceed safely without unnecessary hesitation or confusion.

While it's essential for all vehicles to stop at a four-way stop, simply stopping without regards to other vehicles could lead to confusion or even accidents if multiple drivers try to move through the intersection simultaneously. It is also critical for drivers to be aware of their surroundings and pay attention to other vehicles. By following the practice of yielding to the first vehicle, drivers help maintain order and safety at what can otherwise be a chaotic point on the road.