Suspension means for a vehicle intended to move along at least one rail

The vehicle has a body shell (3) that rests on modules of a sustentation device through suspensions. Each suspension has an upper connector (33), a lower connector (34) and an annular membrane (35). The membrane delimits a watertight cavity (C) between the connectors and authorizes relative displacement of the connectors transversal to a support direction (P), where the cavity receives compressible fluid. The movements of the modules are synchronized relative to the body shell (3) using two synchronization assemblies comprising two cylinders that are connected by a closed fluid circuit.