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WIVA – the innovative system for marking of road construction areas U21 a,bWIVA – the innovative system for marking of road construction areas U21a/bWIVA is the innovative system for road construction areas which uses newly designed board and base for the signs U21 a & b. The WIVA system is a modern temporary traffic flow control tool. It is practical for the storage and transportation. It was manufactured to increase durability of the signs in the risky road environment where accidental hits and damages of the traffic devices are not uncommon. The WIVA system allows for a quick, effective and safe reorganization of the traffic flow thus it improves the safety of road users as well as those working on the road.
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