Hold-short lines mark the boundary you must not cross without explicit clearance to access the runway. Which option best describes this boundary?

Hold-short lines mark the boundary you must not cross without explicit clearance to access the runway. Which option best describes this boundary?

• A. Hold-short lines indicate the boundary that you must cross to access the runway.
• B. Hold-short lines mark the boundary for holding aircraft at a runway exit.
• C. Hold-short lines indicate where you should stop after takeoff.
• D. Hold-short lines show where to stop before a taxiway exit.

Answer: (B)

Hold-short lines mark the boundary you must not cross without explicit clearance to access the runway. They sit on taxiways at the point where you would enter the runway, so you must stop behind them until ATC clears you onto the runway or to cross it. The boundary is tied to where you would be holding before entering (or re-entering) the runway, which is why describing it as the boundary for holding aircraft at a runway exit best fits the concept of not crossing into the runway without clearance. The other options don’t fit because hold-short lines aren’t about stopping after takeoff or about stopping before a taxiway exit in general; they specifically indicate where you must hold to prevent unauthorized entry onto the runway.

Hold-short lines mark the boundary you must not cross without explicit clearance to access the runway. They sit on taxiways at the point where you would enter the runway, so you must stop behind them until ATC clears you onto the runway or to cross it. The boundary is tied to where you would be holding before entering (or re-entering) the runway, which is why describing it as the boundary for holding aircraft at a runway exit best fits the concept of not crossing into the runway without clearance.

The other options don’t fit because hold-short lines aren’t about stopping after takeoff or about stopping before a taxiway exit in general; they specifically indicate where you must hold to prevent unauthorized entry onto the runway.