John Watkins, a member of New South Wales Legislative Assembly, stated they would be added to the New South Wales prohibited weapons list. Private possession of spike strips was banned in New South Wales, Australia in 2003 after a strip cheaply constructed from a steel pipe studded with nails was used against a police vehicle. Remotely deployable spike strips have been invented to reduce the danger to police officers deploying them. Dallas, Texas police are among those banned from using them, in response to the hazards. In the United States, five officers were killed deploying spike strips in 2011 alone, having been struck by fleeing vehicles. They are historically a development of the caltrop, with anti-cavalry and anti-personnel versions being used as early as 331 BC by Darius III against Alexander the Great at the Battle of Gaugamela in Persia. The spikes may be hollow or solid hollow ones are designed to detach and become embedded in the tires, allowing air to escape at a steady rate to reduce the risk of the driver losing control and crashing. (These particular models, however, retract and do not cause damage when a vehicle drives over them from the proper direction.) They also may be detachable, with new spikes fitted to the strip after use. The spikes are designed to puncture and flatten tires when a vehicle is driven over them they may be portable, as a police weapon, or strongly secured to the ground, as those found at security checkpoint entrances in certain facilities. Generally, the strip is composed of a collection of 35-to-75-millimetre-long (1+1⁄2 to 3 in) metal barbs, teeth or spikes pointing upward. A spike strip (spike belt, traffic spikes, tire shredders, stingers, stop sticks, Stinger or formally known as a tire deflation device) is a device or incident weapon used to impede or stop the movement of wheeled vehicles by puncturing their tires. ![]() ![]() Krähenfüße waren Vorläufer der modernen Nagelsperren. Fahrzeugreifen können auch durch selbstgebastelte Nagelbretter oder einzelne Krähenfüße beschädigt werden. Darüber hinaus gibt es Nagelstreifen, die fest in die Straße eingebaut sind. Die Polizei nutzt Nagelsperren unter anderem, um Geisterfahrer zu stoppen oder eine Verfolgungsjagd zu beenden. Eine Nagelsperre, auch Nagelband, Nagelstreifen, Nagelkette oder Nagelgurt und umgangssprachlich Reifenkiller genannt, ist ein Mittel, mit dem die Gummibereifung von Fahrzeugen beim Darüberfahren zerstört werden kann.
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