In order to connect safety barriers with different properties in a safe way, a transition is required.
For the time being CE-marking of transitions is not possible. That is why specifications for transitions are regulated by the VGU. Requirements for transitions in the VGU is depending on the differences between the properties of the connected safety barriers. NRS has developed different types of transitions based on requirements in the VGU.
On one way roads or roads with barriers in the median it is accepted to connect a stiffer safety .