I took two bridge designs (lattice girder and truss) and combined them. I know it isn't realistic, but the design is the best I could come up with. However, the truss part is removable via Technic pins, so it can become more viable for display at shows or home layout use.
Here is the bridge with the top trusses on.
The bridge with the top trusses removed. The 18 Technic holes could be used for decoration of some sort.
The two ramps (which are included in the LDD file) use two-thirds of a brick every 16 studs over three track-lengths to make the gap from base-plate level to full bridge height.
PLEASE NOTE: Their is a height restriction for the bridge with the top attached if you use the Maersk double-stack train cars or anything taller than set 10014 (My Own Train - Caboose). The bridge will simply not fit anything taller without modifications. (The train car is NOT included in the LDD file!)
Here is my original inspiration for the bridge, courtesy of Flickr user Fireglo450: lattice girder bridge on Flickr
The Lego Digital Designer file for my model is here: LDD file This bridge will be built in real life sometime around January 2017.
Comments, Questions, & complaints are welcome!