The driver of a vehicle approaching an intersection that has an official traffic-control signal that is inoperative shall bring the vehicle to a complete stop before entering the intersection and may proceed with caution only when it is safe to do so. If two or more vehicles approach an intersection from different streets or highways at approximately the same time and the official traffic-control signal for the intersection is inoperative, the driver of each vehicle shall bring the vehicle to a complete stop before entering the intersection and the driver of the vehicle on the left shall yield the right-of-way to the driver of the vehicle on the right. (Ord. 01-89 § 2, 2001.)