FAA Ground School Practice Test

A steady green light from the control tower signifies that a pilot is cleared for takeoff. This specific signal is part of the standardized aeronautical lighting system, which provides clear and unambiguous communication between air traffic control and pilots. In this case, the steady green light indicates that the runway is clear and safe for the aircraft to proceed with takeoff.

Understanding the other signals can help reinforce why a steady green light is the correct indication for takeoff. A flashing green light typically indicates that the aircraft should return to the landing area, which is not an indication of being cleared for takeoff. An alternating red light is used to signal that the runway must not be entered or is unsafe for takeoff or landing. A steady red light indicates that aircraft must not take off or approach the runway, meaning it is prohibited. Therefore, the use of a steady green light as a clear and direct communication signal for takeoff is fundamental for ensuring safety and efficiency in air traffic operations.