Which type of security feature stops vehicles from crashing through the doors of a building?

A turnstile is a mechanical gate that enforces one-person-at-a-time entry for personnel access control and provides no resistance to vehicle impacts.

Bollards are physical security barriers engineered to absorb and deflect vehicle impacts, directly addressing the threat of a vehicle being driven through a building's entrance or perimeter. They are typically constructed from hardened steel or reinforced concrete and are rated by the vehicle weight and speed they can withstand. Unlike other physical controls, bollards are purpose-built for vehicle threat mitigation rather than personnel access control.

A mantrap is an access control vestibule with two interlocking doors designed to prevent tailgating by personnel, not to stop vehicle intrusions.

A receptionist is a human administrative control used for visitor management and identity verification, not a physical barrier capable of stopping vehicles.