1. A railway car for transporting containers and trailers, said car including a flat deck, a pair of vertical rub rails extending longitudinally substantially the length of said car on said deck, said rub rails being spaced inwardly from the opposite sides of said deck to provide thereon a pair of outwardly disposed longitudinal runways, a trailer hitch supported on said deck between said rub rails adjacent an end of said car, said trailer hitch being movable from a collapsed position to an erect position for attachment to a trailer, the improvement of a container support arrangement comprising a first pair of container brackets, each having a flat supporting surface adapted to support a container at its corners at one end thereof, first means connecting said first brackets, respectively, to said rub rails for relative sliding movement, first bracket positioning means on said deck at one end thereof in said runways and being located opposite said trailer hitch, each said first brackets including means securing the same in said positioning means, said first brackets being movable with said first connecting means from said first positioning means to a stored position between said rub rails and rearwardly of said trailer hitch, a second pair of container brackets, second bracket positioning means on said runways longitudinally spaced from said first positioning means, said second brackets each including flat supporting surfaces adapted to support said container at its corners at the opposite end thereof and second means securing the same to said second bracket positioning means and, means movably connecting said second pair of container brackets to said rub rails whereby said second brackets may be moved from said second positioning means to a stored position between said rub rails.