If the traffic signals at an intersection are not working, treat the intersection as a(n)

Explanation

If the traffic signals are not working, treat the intersection as an all-way stop. That is, you must come to a complete stop and then follow the rules for yielding the right-of-way at all-way stops. (Note: Some other US states require you to treat an intersection with broken traffic signals as an uncontrolled intersection rather than an all-way stop. When traveling out of state, always check the local traffic laws.)