taxi clear of runway or do not land.
Steady red typically refers to a traffic signal that indicates drivers must come to a complete stop and remain stopped until the signal changes. In context with aviation, a steady red light on a runway is used to indicate to pilots that the runway is closed and they should not take off or land.
stop: clear the active runway
warning- use caution
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.
A red light - steady or flashing - means STOP. A steady amber light means Caution - signal about to change. A flashing amber light means SLOW DOWN.
A traffic light with a steady red light means stop. All traffic must come to a complete stop until the light turns green. It is illegal to proceed through an intersection with a steady red light.
It means get off the runway now, or, if flying, do not land here.
In aviation, flashing red means get of the runway if you are on the ground and it means the airport is not safe for landing if you are in the air.
A steady yellow light typically indicates that the traffic signal is about to turn red. It serves as a warning for drivers to prepare to stop before the light changes.
From CFR 14 Part 91.125 Steady red On the Ground: Stop In the Air: Give way to other aircraft and continue circling. Flashing red On the Ground: Taxi clear of runway in use In the Air: Airport unsafe-do not land.
clear the active runway