A flashing amber light means approach the lock at a safe speed and under full control.
General Warning: Exercise extreme precautions
Flashing RED: clear the active runway. Flashing RED AND GREEN: General Warning: Exercise extreme caution.
Exercise extreme caution.
If they have a green flashing light on top of their car, then they are a Doctor, and have as much priority as a regular emergency vehicle.
A flashing yellow light in aviation terms is a runway guard light.
Flashing amber light means slow down, watch for potential dangers. Flashing red means stop; proceed if and when it is safe.
battery light flashing means the battery is not charging,check alternator fuel light flashing means very low or almost out of fuel.
A stale green light means that the green traffic light cycle has almost ended and will change to yellow at any moment. One way to tell if it is a stale green is to look at the pedestrian crossing light, if it is flashing do not walk or is solid do not walk it could be a stale green.
Cleared to cross
Green
unknown