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Positioning signage is generally used in case of:

ANeed to replace enforcement officers.
BHeavy traffic situations.
CRoad works.Correct
Explanation
Positioning signage, which includes elements such as cones, beacons, gantries, and mechanical or luminous devices (like the signalman figure shown in the image), is intended to delimit obstacles, detours, or narrowing of the roadway. This signage is commonly used in road works situations to ensure the safety of users and workers, clearly guiding traffic flow. These devices are not intended to replace law enforcement officers in their inspection duties, nor are they generally applied solely due to heavy traffic situations, as their primary function is the physical and visual marking of temporary changes in the road layout.
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