What should you do when you approach a traffic signal that is not working?

When approaching a traffic signal that is not working, the appropriate action is to treat it as a stop sign. This means that you should come to a complete stop, check for any oncoming traffic or pedestrians, and then proceed through the intersection when it is safe to do so. This procedure is important for maintaining safety at an intersection where the normal traffic control signals are not operational, as it helps prevent confusion and potential accidents among drivers who may not know how to navigate the intersection without the signals.

The other choices may lead to unsafe situations. Continuing through without stopping could result in collisions, as other drivers may also be uncertain and could enter the intersection unexpectedly. Waiting for the signal to turn green is not advisable since the signal is not functioning, making it ineffective to expect it to change. Honking the horn might disturb the flow of traffic and is not an appropriate action in this context, as it does not contribute to resolving the situation at a non-functioning traffic signal.