An improved intermodal rail vehicle to form a train of highway trailers including leading and trailing highway trailers (14, 12), which are interconnected to each other and supported by the intermodal vehicle for travel on railroad tracks, each of the highway trailers including a leading coupler socket assembly at one end and a trailing coupler socket assembly at the other end, each intermodal rail vehicle having two rail wheel assemblies each having spaced apart rail wheels carried by a rotatable axle, two lower frame assemblies (128, 130) into which each of the two rail wheel assemblies are mounted, an upper frame assembly supported on the lower frame assemblies (28, 30, 128, 130) by integral air springs, the upper frame including leading and trailing load carrying structures comprising: an integral drawbar assembly mounted on the upper frame assembly and extending above the leading and trailing load carrying structures, each end of the assembly of an associated highway trailer supported on an associated load carrying structure to connect the associated trailer to the intermodal vehicle; wherein the drawbar assembly has a high and a low end; wherein the high end is adapted for entry into the front trailer coupler socket; and wherein the low end is adapted for entry into the rear trailer socket; such that the trailers, when coupled to the intermodal rail vehicle, will run parallel to the track; characterized in that a gimbaled coupling arrangement interconnects the two lower frame assemblies, the gimbaled coupling arrangement comprising: a bearing block connected to one of the two lower frame assemblies (128, 130); a central connection pin rotatably connected to the bearing block and extending orthogonal to an axis of rotation of the respective rotatable axle; a bearing pin extending through a mid-portion of the central connection pin and having a longitudinal axis that is substantially parallel to the axis of rotation of the respective rotatable axle; a yoke rotatably connected to the bearing pin and forming a fastener opening extending perpendicular to the longitudinal axis of the bearing pin; a fastener disposed through the fastener opening and connecting the yoke to the other of the two lower frame assemblies (128, 130); a resilient element disposed between the fastener and the yoke, the yoke being in contact with a portion of the other of the two lower frame assemblies (128, 130) when the resilient element is in a first compressive state and at a predetermined distance therefrom when the resilient element is in a second compressive state. an integral drawbar assembly mounted on the upper frame assembly and extending above the leading and trailing load carrying structures, each end of the assembly of an associated highway trailer supported on an associated load carrying structure to connect the associated trailer to the intermodal vehicle; wherein the drawbar assembly has a high and a low end; wherein the high end is adapted for entry into the front trailer coupler socket; and wherein the low end is adapted for entry into the rear trailer socket; such that the trailers, when coupled to the intermodal rail vehicle, will run parallel to the track; characterized in that a gimbaled coupling arrangement interconnects the two lower frame assemblies, the gimbaled coupling arrangement comprising: a bearing block connected to one of the two lower frame assemblies (128, 130); a central connection pin rotatably connected to the bearing block and extending orthogonal to an axis of rotation of the respective rotatable axle; a bearing pin extending through a mid-portion of the central connection pin and having a longitudinal axis that is substantially parallel to the axis of rotation of the respective rotatable axle; a yoke rotatably connected to the bearing pin and forming a fastener opening extending perpendicular to the longitudinal axis of the bearing pin; a fastener disposed through the fastener opening and connecting the yoke to the other of the two lower frame assemblies (128, 130); a resilient element disposed between the fastener and the yoke, the yoke being in contact with a portion of the other of the two lower frame assemblies (128, 130) when the resilient element is in a first compressive state and at a predetermined distance therefrom when the resilient element is in a second compressive state. a bearing block connected to one of the two lower frame assemblies (128, 130); a central connection pin rotatably connected to the bearing block and extending orthogonal to an axis of rotation of the respective rotatable axle; a bearing pin extending through a mid-portion of the central connection pin and having a longitudinal axis that is substantially parallel to the axis of rotation of the respective rotatable axle; a yoke rotatably connected to the bearing pin and forming a fastener opening extending perpendicular to the longitudinal axis of the bearing pin; a fastener disposed through the fastener opening and connecting the yoke to the other of the two lower frame assemblies (128, 130); a resilient element disposed between the fastener and the yoke, the yoke being in contact with a portion of the other of the two lower frame assemblies (128, 130) when the resilient element is in a first compressive state and at a predetermined distance therefrom when the resilient element is in a second compressive state.