This clever, and very safe barrage means invented the company «ETI CO LTD» from South Korea, calling it Road Roller System (the road roller system). It consists of a sturdy steel tube height 96 cm, between which the plastic, spinning around its axis, castors height 40 cm, which crumble in a bright orange or yellow reflective tsveta.Pri accident this barrier bend, taking the lion's share of the impact force, and without causing great damage to the vehicle. And due to twisting rollers car firstly loses its inertia, and secondly, changing the trajectory of accidental movement always turned sideways to the bump stop and returning to the road. As a result, this barrier protection prevents "Return" car becomes in itself Statement cause human injury and death. Moreover, it causes much less damage to the machine, without bending the cab and does not allow the vehicle to roll over.