
Hostile vehicle mitigation (HVM) is a generic term that covers a suite of anti-terrorist protective measures that are often employed around buildings or publicly accessible spaces/venues of particular significance. The design of these various vehicle security barriers and landscape treatments came about as security authorities across the globe sought to mitigate the effects of
vehicle borne improvised explosive devices (VBIED). The sorts of places that warrant consideration as potential terrorist targets in need of HVM include: government buildings, airports, large railway stations, sports venues, concentrations of entertainment and crowded night time economy, etc.
Usage
Common types of HVM include locally manufactured barrier systems such as the
Jersey Barrier and
Bremer T Wall; as well as propriety crash-tested and engineered vehicle bollard systems designed to resist the effects of a
vehicle ram attack. HVM can also include adapted hard landscape features, resistive street furniture, sculpture, planters and significant level changes; with a little imagination HVM may be disguised inside architectural features in a street scene.
HVM when installed and fixed correctly is designed to resist hostile vehicle penetration of certain categories of vehicle moving at a range of speeds, these vehicle security barriers undergo various destructive tests carried out by accredited test establishments. The three standards that are generally quoted when specifying HVM performance are:
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ISO IWA 14-1 - an international working agreement
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BSI PAS 68 - the UK standard
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ASTM
ASTM International, formerly known as American Society for Testing and Materials, is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, an ...
F2656-07 - the US standard.
These standards set roughly similar criteria for destructive impact testing, although there are differences between the three and vehicle geometries in particular are at the root of some of these differences. HVM barrier selection will be conditioned by a hostile
vehicle dynamics study carried out by a suitably qualified security specialist.

Ideally a protective layer of HVM should surround the building or place being protected and this HVM protection line should be stood off from the building facade or places expected to be crowded. This protective standoff distance is critical in the case of VBIEDs as 'every metre counts' and often distance is one of the best ways to achieve explosive blast effects mitigation.

More recently the focus of HVM has expanded to reduce the potential for vehicle ram attacks directed at crowded events and places. Recent non-VBIED (i.e. vehicle as a weapon) attacks against pedestrians include:
* The
2016 Nice truck attack
On the evening of 14 July 2016, a 19-tonne cargo truck was deliberately driven into crowds of people celebrating Bastille Day on the Promenade des Anglais in Nice, France, resulting in the deaths of 86 people and the injury of 458 others. The driv ...
* The
2016 Ohio State University attack
On November 28, 2016, a terrorist vehicle-ramming and stabbing attack occurred at 9:52a.m. EST at Ohio State University's Watts Hall in Columbus, Ohio. The attacker, Somali refugee Abdul Razak Ali Artan, was shot and killed by the first respo ...
* The
2016 Berlin truck attack
On 19 December 2016, a Vehicle-ramming attack, truck was deliberately driven into the Christmas market next to the Kaiser Wilhelm Memorial Church at Breitscheidplatz in Berlin, leaving 12 people dead and 56 others injured. One of the victims was t ...
* The
2017 Jerusalem attack
* The
January 2017 Melbourne car attack
* The
2017 Sandy, Utah attack
* The
2017 Stockholm truck attack
* The
2017 Westminster attack
On 22 March 2017, a terrorist attack took place outside the Palace of Westminster in London, seat of the British Parliament. Khalid Masood, a 52-year-old Briton, drove a car into pedestrians on the pavement along the south side of Westminster ...
* The
2017 London Bridge attack
On 3 June 2017, a terrorist vehicle-ramming and stabbing took place in London, England. A van was deliberately driven into pedestrians on London Bridge, and then crashed on Borough High Street, just south of the River Thames. The van's three occ ...
* The
2017 Finsbury Park attack
The 2017 Finsbury Park attack was a terror-attack in Finsbury Park, London, England, on 19 June 2017. A van was driven into pedestrians in Finsbury Park, London, by Darren Osborne, causing one death and injuring at least nine people. This occu ...
HVM can also be used to protect against
ram raids which are invariably criminal attacks against high net-worth targets such as jewelers,
cash and valuables in transit depots,
bullion
Bullion is non-ferrous metal that has been refined to a high standard of elemental purity. The term is ordinarily applied to bulk metal used in the production of coins and especially to precious metals such as gold and silver. It comes from t ...
storage facilities, art galleries, museums, 'high end' fashion stores, etc.
Correctly installed HVM barrier systems should not adversely affect pedestrian permeability.
See also
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Deaths by car bomb
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Improvised explosive device (IED)
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List of mass car bombings
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Vehicle-ramming attack
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Counter-terrorism
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Security
Security is protection from, or resilience against, potential harm (or other unwanted coercive change) caused by others, by restraining the freedom of others to act. Beneficiaries (technically referents) of security may be of persons and social ...
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Physical security
References
{{Reflist
Counterterrorism
Traffic management