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Normalised Dynamic Deflection

What is Normalised Dynamic Deflection?

Normalised Dynamic Deflection is the second parameter to evaluate the deformation of the safety barrier system under impact and it is calculated as the distance between the traffic face of the system and its initial condition and its maximum displacement. The Dynamic Deflection is measured in metres.

It is up to the national regulations (not EN 1317) to define the criteria that road designers should follow to define the maximum Dynamic Deflection of the safety barrier system to be used on the road, when designing the roadside.

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