TheMetropolitan Police used the new form of "hostile vehicle mitigation equipment", nicknamed "Talon", for the first time during the Naval Association Parade on Whitehall in central London.
The latest equipment takes the form of a road spread net that incorporates tungsten steel spikes.
If a vehicle fails to stop and drives over the net, the spikes will puncture the tyres of the vehicle and the net becomes tangled around the front wheels stopping the vehicle.
The system is also designed to ensure the vehicle skids in a straight line, reducing risk to crowds and producing a well-controlled stop after which officers can engage with the driver.
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When the equipment is deployed, signs are placed in front and behind the net site advising both road users and pedestrians that there are spikes on the road and to follow instructions provided by officers, the Met said.
Different forms of hostile vehicle mitigation barriers have already been installed on nine bridges and a number of other sites across London, following terrorist incidents earlier this year at near Parliament and London Bridge when vehicles were driven into crowds by terrorists.
The use of vehicles as weapons is the latest tool used by terrorists, who have struck crowds across Europe with high- speed cars and trucks.