demarcation bar

demarcation bar

demarcation barclick for a larger image
Markings of demarcation bar for blast pad or stop-way and for taxiway and stop-way preceding a displaced threshold.
A bar that delineates a runway with a displaced threshold from a blast pad, stop-way, or taxiway that precedes the runway. A demarcation bar is 3 ft (1 m) wide and yellow and is not located on the runway.
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By the way, the displaced threshold should not be confused with a demarcation bar, which is a thin (3-foot-wide) yellow stripe marking "a blast pad, stopway or taxiway that precedes the runway.