Where is the runway holding position sign located?

The runway holding position sign is specifically located on runways that intersect other runways. This placement is crucial for maintaining safe operations at an airport, as these signs are used to indicate where an aircraft must stop to yield to other aircraft or vehicles on an intersecting runway. The clear visibility and strategic positioning of these signs help prevent potentially hazardous situations that could arise from an aircraft inadvertently entering an active runway without clearance. By being positioned at these intersections, the signs play a vital role in ensuring orderly and safe traffic management within the airport environment.

The other options do not correctly describe the specific role and placement of runway holding position signs, as their function is particularly critical at points where runways intersect, rather than on all taxiways, at the end of runways, or on runways intersecting taxiways where different signage might be used.