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A speed bump is a bump in a roadway with heights typically ranging between 8 and 10 centimetres (3 and 4 in). The traverse distance of a speed bump is typically less than or near to 0.3 m (1 ft); contrasting with the wider speed humps, which typically have a traverse distance of 3.0 to 4.3 m (10 to 14 ft). [5] [6]
Washington, DC Concrete blocks placed to protect the Terminal 3 at Manchester Airport from hostile vehicle attack; these have now been replaced by more attractive bollards Security measures taken to protect the Houses of Parliament in London, UK. This hostile vehicle mitigation is a common form of target hardening and is designed to prevent a ...
High security bollards are impact-tested in accordance with one or more of three major crash test ratings for vehicle barriers. These are PAS 68 (UK), [27] IWA-14 (International) and ASTM (US). [28] [29] Bollard sleeves in various alloys or finishes are designed to cover security bollards to enhance their visual attractiveness. [citation needed]
Hard barriers are fixed into the ground as a bollard or gate, removable on stands, or clipped to a structure. Regardless of the barrier type, the components and overall assembly will be similar. Regardless of the barrier type, the components and overall assembly will be similar.
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Giselle Smith and Semaj Morris, 17, were both killed on Wednesday, Dec. 11, with Smith's sister Paris Kiper in critical condition
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