The municipality received reports about the ridges and investigated them together with the contractor that built the road at the time and the supplier of the gravel columns. These columns were used to improve the subsoil during the reconstruction: where the ground had subsided, it was filled with gravel so that the road rests on a firmer base. The investigation showed that the road was built as specified.
The municipality will keep monitoring the road and, if necessary, will have the ridges repaired in consultation with the contractor.