What security feature prevents vehicles from crashing through building doors?

• A. Security bollards
• B. Reinforced doors
• C. Bollards
• D. Vehicle barriers

Answer: (C)

Bollards are the most direct way to stop vehicles from reaching a building entrance. They’re vertical posts placed in front of doors that create a hard barrier the vehicle cannot penetrate, transferring the impact into the ground and protecting both the doorway and pedestrians. This kind of passive physical control doesn’t rely on human action and provides visible deterrence as well.

Reinforced doors strengthen the door itself, but a vehicle can still collide with the door and bypass it if there’s no outer barrier to stop the vehicle first. A broader term like vehicle barriers includes various solutions, but the specific feature that prevents a car from crashing through doors is bollards.