At the ends of the trestle there would have been abutments to hold back roadbed fill. These abutments consist of a trestle bent with scale 3″ x 18″ timber boards which would have been nailed through the back before being backfilled. The iregular shape is due to existing profile of the roadbed embankment behind.
Closeup detail showing reinforced boarding applied and cross bracing.
This photo show the level of detail that can be achieved by distressing the wood timbers, staining using the shoe dye and alcohol method and the application of Tamiya weathering chalks which I tend to use a lot of to touchup and add additional staining and watermarks.
Closeup of a typical reinforced trestle bent showing the effects of weather on wood.