A warning barrier is a fixed or followed-up combination of traffic management instruments used to warn or guide road users in the repair objects and in the execution of work in an open road.
The position of the warning barrier shall ensure visibility of the warning barrier at least to the extent of stopping visibility. Both the 2 groups and the 3 group warning barriers are available.
From 01.2019 it is necessary to use 1 + 1 on the roads with a maximum speed of more than 70 km/h and with a traffic frequency greater than 5000 vehicles per day with a light-arrow equipped with at least a group II warning barrier.
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