The RailDoubleTrackSa subassemblies are RailDoubleTracksLefthand, RailDoubleTracksInternal, and RailDoubleTracksRighthand.

The subassemblies allow each track to have its own structural dimensions and can read alignment properties directly from the corresponding alignment—such as rail cant and alignment bearing at the cross-section location—to dynamically respond to cant changes and maintain minimum ballast depth requirements. They also account for cross-section rotation according to the bearings of two tracks and the baseline when the two tracks are not parallel to the baseline.

The subballast top crown is located between the two tracks. These subassemblies are designed to work seamlessly with each other, as well as with the Internal Multi Track and/or the Right Hand Multi Track subassembly, for multi-track railway configurations.

Note: This application uses a custom installer (and not the standard App Store installer).