Abstract: Exemplary double-decker vehicle for railway rolling stock for the transport of passengers comprises at least: one lower deck and one upper deck, each deck having a multiplicity of seats for passengers, and at least one access door with an access step. According to aspects of the system, apparatus, and method, the vehicle can include, among other features, a circulation system connecting the access step to the upper deck and having at least two sloping circulation paths to provide access for persons with reduced mobility to the upper deck.