Abstract: An intermodal rail container/truck trailer includes a container platform with a ground side, and a sill connected to the ground side. The sill includes a first end and a second end. At least one railroad car coupler is connected to at least one of the first end and the second end. The invention further includes an intermodal rail car which includes a rail car frame having a first end and a second end. A first fifth wheel coupler is connected to the rail car frame, and a second fifth wheel coupler is connected to the rail car frame in a longitudinally opposed relation with the first fifth wheel coupler. At least one railroad car coupler is connected to at least one of the first end and the second end. The intermodal rail container/truck trailer and rail car can be interconnected using the railroad couplers and fifth wheel couplers and pins.