This double track spline is based on the Jamestown Viaduct in Fife, Scotland.
The original had 4 truss section, angled piers, was on a slight curve, and had a 1 in 70 gradient. This version
has a single ballast support structure for both tracks but no center piers. The piers (kuid2:210518:1415:1) must be
placed in surveyor, positioned, and rotated as desired. Many thanks to David James Robinson for the pics and info.