They're an additional feature to focus your attention towards the traffic light. The human eye is quicker to catch a flashing light than a steady light.
Nothing. there is no blue light.
Red=stop red flashing= light is broken, use your judgement in crossing.
semáforo: traffic light
If the traffic light is not powered, you are to treat it as a all-way stop sign. I'm assuming that's what you mean by that. If the traffic light is broken, likely there will be utility workers out there working to fix it and you follow their instructions if any.
It means to stop
Proceed with caution.. ~Bemnestle
Proceed with caution.. ~Bemnestle
You must stop
owdown
On traffic lights it means slow down.
A yellow arrow traffic light means that you should yield in the direction you are going. These are often in place when you are turning left.