What is the purpose of hold-short markings at runway intersections?

• A. To indicate weather conditions on the field
• B. To mark parking positions for ground equipment
• C. To designate runway end identifier lights
• D. To designate hold lines for aircraft and vehicle clearance to prevent runway incursions

Answer: (D)

Hold-short markings create a visible boundary that keeps aircraft and ground vehicles out of the runway area until clearance is given. They are placed at runway intersections to designate where you must stop and wait if you do not have permission to cross the runway. The pattern of solid and dashed lines tells you which side must hold and which side may cross when cleared. In practice, you stop at the hold-short line and only cross the boundary when ATC or the procedure authorizes it, which helps prevent runway incursions by ensuring you don’t enter a runway without clearance.

Other options don’t fit because hold-short markings are not used to indicate weather conditions, to mark parking spots for ground equipment, or to designate runway end identifier lights.