What does a blinking red and green light from the ATC tower mean?

A blinking red and green light from the ATC tower indicates a general warning to exercise extreme caution. This signal serves as an important alert for pilots and ground personnel, suggesting that there may be a hazardous condition or situation that could pose a risk to safety. It's essential for individuals on the airfield to remain vigilant and aware of their surroundings when receiving this type of signal.

In contrast, clear signals for ground movement, takeoff clearance, or indications that an emergency situation has been resolved would be represented by specific solid lights or different color combinations that convey clear guidance. The blinking red and green light's purpose is to ensure a heightened awareness of potential dangers, rather than providing a definitive action like moving or taking off. This differentiation reinforces the importance of recognizing and responding to various light signals appropriately in an airfield environment.