What does a flashing green signal indicate for aircraft on the ground?

A flashing green signal for aircraft on the ground indicates that the aircraft is cleared to taxi. This is an important communication from air traffic control to the pilots, signaling that it is safe to move the aircraft from its current position on the tarmac to the designated taxiway and toward the runway.

Understanding the color and pattern of signals is crucial for pilots as they navigate airport operations. A steady green signal, for instance, would indicate that an aircraft is cleared for takeoff when on the runway, whereas a red signal would indicate a stop. The flashing green specifically alerts pilots that they can begin movement on the ground, without implying any clearance for takeoff or landing, which are governed by different signals.