How should you treat an intersection with non-functioning traffic signals?

Treating an intersection with non-functioning traffic signals as a four-way stop is the appropriate action because it helps maintain safety and order among drivers. In situations where traffic lights are out, all incoming vehicles must yield to each other in the same manner as they would at a stop sign. This means that the first vehicle to arrive at the intersection should proceed first, and all other vehicles must stop and yield according to the order of arrival.

This approach helps prevent accidents by providing a clear protocol for drivers to follow, ensuring that everyone understands their responsibilities at the intersection. Traffic patterns can quickly become chaotic without proper rules in place, so adhering to the four-way stop protocol is essential for safe navigation through the intersection.

The other options do not adequately address safety or proper traffic handling at an intersection with inoperative signals. Parking and waiting would be impractical for other drivers and could lead to confusion. Using hand signals is usually not sufficient in this context, as they might not be seen or understood by all drivers. Turning on hazard lights and proceeding through the intersection does not consider the necessity of yielding to other vehicles, which could result in collisions.