Definition
Large yellow X-shaped markings placed on a runway or taxiway to indicate that the surface is permanently closed and unsafe for use. They are painted on the pavement at each end of the closed runway and at intervals of no more than 1,000 feet, and they replace any prior runway or taxiway markings, which are obliterated when the surface is closed.
Plain English
A big yellow X painted on a runway or taxiway means: do not use this surface. It is closed for good.
Context Anchor
Seen on airport pavement markings, especially when a runway or taxiway has been permanently taken out of service.
Why Pilots Care
They alert pilots to avoid unsafe or obstructed surfaces that could cause damage or accidents.
Grounding Statement
If you see yellow X markings on airport pavement, treat that pavement as closed to aircraft.
Intuition Check
Do not assume yellow crosses are just caution marks or temporary construction markings. In this FAA marking context, they mean the runway or taxiway is closed and not available for aircraft use.
Example Sentence 1
On final approach, the pilot noticed yellow crosses painted on the runway and went around, realizing it had been permanently closed.
Example Sentence 2
Yellow crosses marked the closed taxiway during the preflight inspection.