The current version of SolaRoad has been tested in the laboratory on structural strength. A specific ‘tree root test’ was not possible, but the concrete elements are designed and produced in such a way that they will not break very easily. To prevent height differences at the transitions of the elements, we pay special attention to the way in which they are interconnected. When dealing with factors from the (natural) environment, we make full use of existing knowledge and experience with prefabricated slabs.