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Usually metal or metal encased concrete pillars that can be raised and lowered to allow pedestrian traffic, but not peaceful truck drivers. You see them a lot around government buildings for some reason.
The ones that were constructed after the embassy bombings of the late 90s early 2000s?
Usually metal or metal encased concrete pillars that can be raised and lowered to allow pedestrian traffic, but not peaceful truck drivers. You see them a lot around government buildings for some reason.