The boring of the tunnels resulted in a significant amount of surplus soil. This was put to good use to construct a buffer belt that shields off the residential area of Kallo from the Liefkenshoek railway link, as well as from the R2 and E34 motorways. Consequently, the noise nuisance in residential areas caused by the traffic on both motorways was significantly reduced.
Buffer belt around Kallo
Sound buffer around Kallo Rietveld