What is the correct term for the point where an aircraft and vehicle have permission to cross?

The term "Point of crossing" refers to the specific location where an aircraft and a ground vehicle are authorized to cross paths. This designation is crucial for maintaining safe operations on an airport's taxiways and runways. It serves as a defined area where air traffic control or ground operations personnel have determined that it is safe for both the aircraft and ground vehicle to interact without risk of collision.

In airport operations, clearly defined terms help enhance situational awareness among pilots and ground personnel, ensuring that everyone understands when and where it is safe to cross. This designation is specifically important during busy operations when multiple aircraft and vehicles are navigating the same space.

The other terms presented do not accurately capture the concept of authorized crossing locations. A "Crossing perimeter" is not a standard term used in air traffic control contexts. While "Taxiway junction" refers to where taxiways intersect, it does not denote a specific point of authorized crossing for vehicles. Similarly, a "Runway intersection" describes where runways cross each other, which is also not relevant to the point in question concerning aircraft and vehicle permissions. Thus, "Point of crossing" is the most appropriate choice for this situation.