Multiservice security counterweightsystem

The counterweight has two side parts situated on both sides of a central part (1) that is constituted of a storage box. The side parts are constituted of side masses (2) that are made of concrete or cast iron. The side masses are symmetric and reversible so as to be fixed at the right or at the left of the central part. The side masses have outer walls (20) that are obliquely directed towards the rear so as to constitute leakage surfaces guiding objects towards an exterior of a rolling vehicle.