Where would a red sign with white font indicating a hold line be located?

A red sign with white font indicating a hold line is typically located at the VFR Holdline for a runway. This type of sign is an essential safety feature on the airfield, serving to alert pilots and ground vehicles that they are approaching a designated point where they must stop and hold before entering a runway area.

The specific location of such signs is crucial because they are placed where controlled access to runways is necessary. It ensures that no aircraft or vehicles inadvertently enter a runway without clearance, thereby maintaining safety in operations.

Other locations mentioned, such as at the departure gate or near the fueling station, are areas where hold lines are not typically marked because they do not involve direct interactions with runways. Likewise, the entrance of the airfield does not require a hold line sign as it does not pertain to the specific operation of merging into runway traffic. Thus, the VFR Holdline for Runway 4-22 is the appropriate and correct context for the presence of a red sign with white font indicating a hold line.