What color are the two lights located at the intersection of a taxiway with a runway?

• A. Green
• B. Blue
• C. Amber
• D. Red

Answer: (B)

The main idea is how airport lighting uses color to tell you what surface you’re on. Taxiway edge lights are blue, runway lights are white, and taxiway centerline lights (which guide you along the center of the taxiway) are green. At the point where a taxiway meets a runway, you’ll see blue lights on both sides of the taxiway edge. These two blue lights mark the boundary of the taxiway and indicate that the taxiway continues beyond the intersection rather than turning onto the runway. This helps you stay on the proper path and avoid entering the active runway.