Final answer:
If a traffic signal is not working due to a power failure and there is no officer or other traffic control in place, drivers should treat the intersection as an all-way stop.
Step-by-step explanation:
If a traffic signal is not operational (dark) because of a power failure and there is no officer or other traffic control in place, you should treat the intersection as an all-way stop. This means that all drivers approaching the intersection must come to a complete stop and yield the right-of-way to any other vehicles or pedestrians that have already stopped at the intersection. The drivers should then proceed through the intersection in the order that they arrived at the stop sign.