Margaritelli Ferroviaria S.p.A. is the first Italian manufacturer to have been granted certified approval for its PRC sleepers with integrated USP (Under Sleeper Pad), in compliance with technical specifications set out for supplying the Italian Railway Network (RFI). This is an important certification, indispensable if we are to market the product on an industriale scale. It is the result of all the hard work done in research and development which began back in 2011. Including a long period of experimentation on the line, in order to measure improvements in track performance on high speed lines and in tunnels. The results of this research were presented to the RFI on 12 May 2016 at the CIFI convention under the conference title “Innovative materials for railway construction: PRC sleepers and cross-pieces fitted with USPs”. Other important factors in gaining RFI approval were perfecting the sleeper pad application process and establishing standards for monitoring and product testing.