Describe guard lights and stop bars, and what happens when it is safe?

Describe guard lights and stop bars, and what happens when it is safe?

• A. Guard lights white; stop bar blue
• B. Guard lights red; stop bar green
• C. Guard lights two green; stop bar off
• D. Guard lights two yellow flashing; stop bar red; when safe, stop bar off and green lead-on

Answer: (D)

When approaching a runway/taxiway intersection, guard lights and a stop bar form a protective clearance system. The guard lights are two amber (yellow) flashing lights flanking the entrance, signaling caution and that the intersection is controlled. Across the taxiway, the stop bar appears as red lights, requiring you to stop if it’s illuminated. When ATC clears you to proceed, the stop bar is turned off and the green lead-on lights come on to show you the authorized path and indicate that you may proceed. This precise sequence—amber guard lights, red stop bar, then stop bar off with green lead-on when safe—is what the correct option describes.

When approaching a runway/taxiway intersection, guard lights and a stop bar form a protective clearance system. The guard lights are two amber (yellow) flashing lights flanking the entrance, signaling caution and that the intersection is controlled. Across the taxiway, the stop bar appears as red lights, requiring you to stop if it’s illuminated. When ATC clears you to proceed, the stop bar is turned off and the green lead-on lights come on to show you the authorized path and indicate that you may proceed. This precise sequence—amber guard lights, red stop bar, then stop bar off with green lead-on when safe—is what the correct option describes.