Where are closed taxiway markings located and how are they spaced?

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When a taxiway is closed, it’s essential to clearly define the boundary so pilots don’t mistake a closed path for a usable one. The standard approach is to place taxiway closure markings at each end of the closed section and at any potential entrance to that section. The first marking should be within 10 feet of the end of the closed taxiway or where the closed portion intersects an active runway, and subsequent markings are spaced no more than 100 feet apart along the boundary. This arrangement provides clear, continuous cues near junctions and approaches, reducing the risk of inadvertent entry. Marking only at runway intersections or only along the centerline would leave parts of the boundary less visible, and spacing too far apart (like 200 feet) or too close (like 50 feet) would not align with standard practice for reliably signaling the closure.