The advantage of an overhead door trailer is that the trailer can be brought directly to dock while the doors are closed. Once the trailer is at the dock, the doors can be opened without moving the trailer. The disadvantage of an overhead door trailer is that since the door rolls up, the trailer will lose some overhead space when the door is closed. The advantage of a swing door trailer is you have more interior clearance, while the disadvantage of a swing door trailer is you are unable to open the trailer while the trailer is at a dock.
