Which of the following consist of four yellow lines, two solid and two dashed, extending across the width of the taxiway?

• A. Emergency holding position markings
• B. Taxiway holding position markings
• C. Runway holding position markings
• D. Intersection holding position markings

Answer: (C)

Four yellow lines across the width of a taxiway with two solid lines and two dashed lines indicate the boundary where aircraft must hold short of a runway. The solid lines represent the boundary you must not cross without explicit clearance, while the dashed lines on the other side show where you may cross if ATC has authorized it. This marking is placed at taxiway/runway intersections to prevent incursions onto an active runway and to control access. In other words, it tells pilots exactly where to stop and where crossing is permitted with clearance.