Brewstir said "How does a person that is arriving at a flashing yellow situation know for sure that cross traffic has a flashing red unless you had been there before? If cross traffic also has flashing yellow because of a malfunction in traffic signal, everyone yields like a 4 way stop? "
By that same logic, how do you know when you come to a green light that it is red in the opposite direction and not malfunctioning? Should you stop at green and check?
Flashing Amber - slow down and proceed with caution
Flashing Red - stop until it is safe to proceed.