Chapter 5 — Signals and Signs 77 Some traffic signals have a combination of “protected” turn arrow signals and  “unprotected” circular signals based on traffic demand. At these intersections,  both through traffic and turning traffic are controlled by circular signals if no  arrow signal is displayed. When arrow and circular signals are both displayed,  turning traffic is controlled by the arrow signals and through traffic is controlled  by the circular signals. Below are examples of combination signal displays you  may see. When approaching an intersection with a traffic light that has malfunctioned  due to a power outage or some other problem, you should approach the  intersection and proceed as though the intersection is controlled by a stop sign  on all approaches to the intersection. This does not apply if a law enforcement  officer or another authorized person is directing traffic, or if another type of  traffic control device is in operation. The flashing red signal has the same meaning as the stop sign: stop and do  not proceed to move until you can enter the intersection without interfering  with approaching traffic. The flashing yellow signal has the same meaning as a  warning sign. Slow down and proceed with caution. This traffic signal head is designed to make it easier for drivers to know what  to do when making a turn. The traffic signal head has a flashing yellow  arrow section. When the flashing yellow arrow is shown, the indicated turn is  permitted but drivers must yield to oncoming traffic and pedestrians. Below are some examples of what this style traffic signal head looks like and  what drivers should do as the light changes:  Solid Red Arrow:  Stop. No turns are allowed. Solid Yellow Arrow:  Prepare to stop. Flashing Yellow Arrow:  Turns are allowed, but first they must yield to oncoming traffic and pedestrians. Solid Green Arrow:  Turns are allowed, and they should not need  to yield to oncoming traffic and pedestrians. Proceed with caution.  U-turning traffic should yield to opposing right turning traffic when  both have green arrow.  *For right turn signal heads, a steady red circular signal may be provided rather than a red arrow. Flashing Yellow Arrow Traffic Signal Heads  (left and right turns) Flashing Signals *