Abstract: The invention is a drive-in pallet racking system for a large transportation vehicle like a railcar or truck trailer. The racking system includes a plurality of center posts which define two drive-through passageways along the length of the vehicle. Pallet-supporting rails are mounted on each side of the posts. One rail is mounted to the posts and the other is mounted on the sidewall opposite the posts. The rails are spaced apart so that a forklift can drive in between them. However, the spacing is sufficiently narrow so that the rails can support the edges of the pallet without any intermediate support.