Where is a red sign with a white font identifying 4-22 typically found?

A red sign with a white font identifying 4-22 is typically found at the VFR holdline for Runway 4-22 because this sign serves to inform pilots and vehicle operators of the specific runway that they are approaching. These signs are critical for safe operations on the airfield, as they help ensure that individuals are aware of their location in relation to the associated runway, facilitating proper decisions and actions. The VFR holdline specifically indicates where aircraft and vehicles must stop to ensure safe separation from runway operations, making it the most logical place for such a sign to be located.

In contrast, a runway threshold would generally have a different type of marking, and while signs at taxiway entrances may also provide important operational information, they usually indicate which taxiway leads to a specific runway rather than directly marking the runway itself. Ground service areas are typically not where runway identifiers are placed, as their focus is more on supporting services rather than warning or instructional signs related to runway usage.