TOFA stands for Taxiway Object Free Area. Why is TOFA considered more stringent than ROFA?

TOFA stands for Taxiway Object Free Area. Why is TOFA considered more stringent than ROFA?

• A. Because ROFA standards do not apply to construction zones.
• B. Because aircraft wings often extend past the paved surface.
• C. Because TOFA permits construction under supervision.
• D. Because TOFA only applies to airports with towers.

Answer: (B)

The main idea is that aircraft wings can extend beyond the edge of the paved surface when taxiing, so the space around taxiways must be kept free of obstacles larger than on runways. TOFA is the obstacle-free area around taxiways, and because wingspan and turning of taxiing aircraft can cause wingtips to reach past the pavement edge, the clearance requirements around taxiways are made more stringent. This ensures there’s enough safe space for wingtip movement and prevents obstacles from being encountered during taxi operations. That’s why the correct reason is that aircraft wings often extend past the paved surface. The other options don’t describe this safety consideration.

The main idea is that aircraft wings can extend beyond the edge of the paved surface when taxiing, so the space around taxiways must be kept free of obstacles larger than on runways. TOFA is the obstacle-free area around taxiways, and because wingspan and turning of taxiing aircraft can cause wingtips to reach past the pavement edge, the clearance requirements around taxiways are made more stringent. This ensures there’s enough safe space for wingtip movement and prevents obstacles from being encountered during taxi operations.

That’s why the correct reason is that aircraft wings often extend past the paved surface. The other options don’t describe this safety consideration.