After terrorist attacks from Barcelona, Stockholm, London or Nice, humanity has learned one – if you cannot predict the attack, you must be prepared for it at any time. One of these possibilities are concrete blocks that prevent the car from entering the promenade. However, they are not always effective and do not always work on any type of car. Therefore, it is better to invest in the road-blocks. Here you are a few types.
Several safety levels – American scale
The essence of the blockades is protection against enemy invasion, but in this case, they can be used on the streets of our cities, of course anti-terrorism. To determine their level of security, we could use an American scale:
- K8 – one of the smaller values (sometimes we could find also K4). It stops the lorries even at a speed of 65 km / h;
- K12 – the most