This is the view that gives me the most to work from ... I can duplicate this picture rather well from both ends. I will also add the sandbags.
The model bridge that I have ends exactly with the last steel girder that supports the large motorized section. That means I will be adding from that point to the left. The sandbags on the right side here would be part of the added section and I could add as much as you wish. The six inches that you suggest on either side would just allow me to incorporate the sandbag concept and little more.
When you examine the other end of the bridge, the sandbags are located on the bridge itself. The model that I have extends all the way to the telephone pole where the two pencile lines cross. The six inch addition would be from that point and to the left. That addition would be out of site in this pictue but can be replacated from other pictures. Little more than an extension of the road and a overgrown brush area.
The cement support wall ends exactly where the telephone poll is or where the lines cross. From that point it is dirt and brush.
The building on the back side of the bridge would be dropped for the landscape so that we could use all 6 inches in width for the front side. In doing this, the bridge would be backed up against the shelf wall.
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