What do the Runway Threshold Lights indicate?

The indication given by the Runway Threshold Lights is essential for pilots and ground crews as they approach the runway. These lights are configured to provide specific visual cues to indicate the beginning of the usable runway.

The configuration of red on one side and green on the other represents the threshold lighting system used at airports. The red lights guide pilots during approach, signaling the end of the runway, while the green lights indicate the start of the runway suitable for landing and takeoff. This color differentiation is critical for safety as it helps to provide directional orientation during landing or takeoff maneuvers, particularly in low visibility conditions.

Understanding the function of these lights is crucial for ground operations and flight safety as it enhances situational awareness for pilots during critical phases of flight.