For an aircraft on the ground, it means that you are cleared for taxi. For an aircraft in flight, you must return for landing or go around and attempt landing again.
No, Flashing your headlight's will have no effect on a traffic signal. The reason a traffic signal changes for emergency vehicles that have the lights flashing, is, they have a special transmitter that tells the light to change. This transmitter is connected to the emergency lights so it comes on when the lights are used.
This is called a "stale green" signal. It is about to change to amber. This is also recognized at some intersections by the flashing crosswalk signal informing pedestrians not to cross.
Exercise extreme caution.
A flashing green light typically indicates that a vehicle is allowed to proceed with caution, often seen at certain traffic signals or in emergency vehicle situations. It may also signal the presence of a pedestrian crossing or indicate that a traffic light is about to change. In some contexts, such as aviation, a flashing green light can denote that an aircraft is cleared for takeoff or landing. Always refer to local traffic laws for specific meanings.
Cleared to cross
Cleared to cross
An advanced green is a type of traffic light signal present in some jurisdictions in Canada, where the green light initially flashes while the matching light for oncoming traffic remains red, signalling to drivers that they may make an unobstructed turn across the oncoming lane while the flashing continues.
Flashing green lights in Canada indicate that a pedestrian has pushed the button to cross the street. It is a signal for drivers to yield to pedestrians.
On a vertical display traffic signal the green light is on the bottom. On a horizontal display traffic signal it is to the right, but may depend on that state (or municipality's) practice.
This differs depending on the intersection. Some intersections are forever flashing red. Some intersections only turn green when there is a trigger such as a pressure-pad or a crossing signal.
The 13-letter word you're looking for is "traffic signal." It refers to the system of lights used to control vehicle and pedestrian traffic, where the green light indicates that it's safe to proceed.
Flashing RED: clear the active runway. Flashing RED AND GREEN: General Warning: Exercise extreme caution.