An alternating red and green light from the control tower means?

An alternating red and green light from the control tower means?

• A. test brakes
• B. OK to proceed but use extreme caution
• C. return to starting point
• D. proceed with normal taxi

Answer: (B)

Tower light signals on the ground communicate instructions by color and whether the signal is steady or changing. Green means go, red means stop, and when the lights are not steady but alternating, they convey a cautionary instruction. An alternating red and green signal tells you you’re cleared to proceed, but you must do so with extra care and vigilance for other aircraft, vehicles, or hazards in the area. It doesn’t mean proceed as normal without caution, nor does it indicate a brake test or a return to the starting point. So the best interpretation is: you may move, but proceed with extreme caution.

Tower light signals on the ground communicate instructions by color and whether the signal is steady or changing. Green means go, red means stop, and when the lights are not steady but alternating, they convey a cautionary instruction. An alternating red and green signal tells you you’re cleared to proceed, but you must do so with extra care and vigilance for other aircraft, vehicles, or hazards in the area. It doesn’t mean proceed as normal without caution, nor does it indicate a brake test or a return to the starting point. So the best interpretation is: you may move, but proceed with extreme caution.