Barrier post (horizontal hatching) is a traffic sign that indicates the presence of a physical or structural barrier ahead, such as a fence or a wall. It serves as a warning to drivers that they need to be cautious and may need to maneuver their vehicle differently due to the barrier. The horizontal hatching pattern typically highlights the area that is restricted or not accessible to vehicles.

In general, when you see this sign, you should stay alert and be prepared to adjust your driving. It may imply that the road is narrowing, or that there are obstacles further ahead that could affect your route. Always ensure to follow any additional rules or signs displayed in the area to maintain safety.