A red blinking light on the runway typically indicates that the area is unsafe for landing or takeoff, often signaling to pilots to hold or divert. It can also be a warning for obstacles or hazards on the runway. Pilots are trained to respond to such signals by maintaining altitude and avoiding the area until it is deemed safe.
stop: clear the active runway
Blinking red light signifies alertness or danger.
taxi clear of runway or do not land.
stop or give way.
warning- use caution
Stop. Treat the blinking red light as a stop sign.
it is on video camera
usually shows low battery....
If you mean the light gun signals from the control tower- to vehicles, and aircraft on the ground, get off the runway. For aircraft in flight, runway is unsafe, do not land.
Like, maybe, the battery's getting low?
that means that the area you are cleaning is dirty
It means stop first then can proceed if clear