To increase the stability and safety of the track at the isolated joint of the circuit for signalling the presence of trains, also increasing the degree of protection of the wiring from accidental damage but without compromising the normal mechanized maintenance operations, Margaritelli Ferroviaria presents on the market an innovative solution consisting of a kit of special sleepers that, assembled at the origin in a single system with the insulated joints and their cables, it also simplifies the transport and laying operations along the track.