What does a flashing white light from the control tower indicate when taxiing an aircraft?

A flashing white light from the control tower signifies that the aircraft should return to its starting point. This signal is part of a standardized communication method used in aviation to ensure safety and clear coordination during ground operations. When a pilot sees a flashing white light, it indicates that the aircraft is not authorized to proceed further on the taxiway or runway and must instead return to where it began its taxiing.

Understanding the context of this signal is crucial for maintaining order and safety at airports, especially during busy operations where clear communication is essential. The flashing white light serves as a visual cue to pilots that there may be an issue that requires them to stop and not proceed on their current course. This distinguishes it from other signals that could imply different actions, such as clearing the runway or moving with caution.