Precaution for rural airports and roads, incase normal airstations are destroyed:
Of the three types RNoAF would use the F-35A. The shorter runways are typically meant to be used as alternative runways after the main bases are destroyed, so it is mainly the ability to land safely within 800 meters that is the key. Taking off should not be a problem, as they would then most likely be without much heavy armament.
Lots of roads are 2km and straight, not all roads are hardened for aircraft takeoff and landing. Landing on unhardened road damages road. Need special places to land or takeoff.