Everyone knows the "click-clack" sound when you drive across a roadway transition on a bridge. This pulsating sound is increased by unevenness of the surface diagonal to the driving direction. Successful noise reduction for MAURER Modular Expansion Joints is achieved by welded rhombic elements. Downward noise radiation can be absorbed by closing the gap in the construction by means of a folding construction. Since both of these systems are suited for retrofitting, they can be installed at any time.