A railroad car truck for a railroad freight car, such as an autorack car, has a bolster mounted cross-wise between two sideframes. The bolster ends are mounted on respective spring groups carried by the sideframes. The bolster can translate laterally relative to the sideframes. The side frames are mounted to swing laterally relative to the wheel sets, and hence relative to the rails. Resistance to lateral deflection is provided by the resistance of the sideframes to the pendulum swinging motion, and by shear in the spring groups. The truck has a doubled damper arrangement of dampers in a four-cornered layout at each end of the bolster, giving a flexing resistance to yaw between the sideframes and the bolster ends. The doubled damper arrangement works against large wear plates mounted on the sideframe columns. The large wear plates are mounted normal to the dampers and square to the sideframes.

The railway vehicle includes two adjacent carriages (6), each including a carriage body (8), the bodies (8) being supported by a common bogie (1) and being articulated with each other with an articulation device (2). The articulation device (2) is received in a space (30) of the bogie (1), the space (30) being delimited along a longitudinal direction by a first abutment surface and by a second abutment surface (34), the articulation device (2) extending facing the first and second abutment surfaces (34) so that, when the railway vehicle moves in a first longitudinal direction, the first abutment surface comes into contact with the articulation device (2), and, when the railway vehicle moves in a second longitudinal direction, the second abutment surface (34) comes into contact with the articulation device (2).

A railway vehicle includes two adjacent carriages (6), each including a carriage body (8), each carriage (6) including a lower floor (54) and an upper floor (56), positioned above each other so as to define a lower level (58) and an upper level (60), the bodies (8) being supported by a common bogie (1) and being articulated with each other through an articulation device (2). The carriages (6) are connected to each other through an interconnection passage (62), the passage (62) extending substantially at right angles to the articulation device (2) and including a lower floor connecting the lower floors (54) of both carriages (6) and an upper floor connecting the upper floors (56) of both carriages.

A chain of semi-trailer vehicles is intended to be articulated to a main vehicle. Each semi-trailer vehicle includes a body and a single bogie supporting the body, known as a trailer bogie. The bodies of the semi-trailer vehicles are successively articulated to one another from a first semi-trailer vehicle of the chain by a separate inter-body joint. Each inter-body joint is carried by one end of each semi-trailer vehicle connected to a following vehicle. Each inter-body joint is articulated along a vertical pivot axis. Each trailer bogie of a body carries an inter-body joint arranged longitudinally with respect to the body so that the bogie axis and the interconnection axis are offset.

A symmetrical multi-unit railroad freight car, such as a 3-pack railroad intermodal well car, has body units that are connected symmetrically. The body units have a symmetrical arrangement of end trucks and shared trucks. The end trucks are 70 Ton Trucks. The shared trucks are 125 Ton trucks. The trucks have passive steering using geometric rocker stiffnesses. The rockers in the end trucks have a smaller radius of curvature than the rockers in the shared trucks. The spring groups in the shared trucks are stiffer than the spring groups in the end trucks. The spring groups in the end trucks have a different proportion of damping when empty, a shorter live load range of travel, and greater reserve travel than the shared trucks. The end trucks and the shared trucks have four-cornered damper groups that have the same sized damper wedges. The damper wedges have non-metallic wear pads.