The subassemblies insert rails, ties, ballast, subballast, subbase, and soil fill for railway tracks and integrate seamlessly with Daylight subassemblies on both outer sides to match the existing ground in cut and fill conditions.

The MainTrackAndSiding subassembly supports single- and double-track railway configurations, including turnout areas. The roadbed crown is located between the two tracks for double-track configurations and centered beneath the rail ties for single-track configurations and turnout areas.

The other six subassemblies are intended to be combined to create multi-track layouts with three or more tracks. The user may define one or more roadbed crowns, located either beneath any track or between adjacent tracks. The two SingleFlatBed subassemblies can reference the output parameters of the attached subassembly as input parameters, allowing the subballast top elevations to be matched and ensuring continuous drainage.

The subassembly allows each track to have its own structural dimensions and can read alignment properties directly from the corresponding alignment—such as track width, cant, and alignment bearing at the cross-section location—to dynamically respond to cant and bearing changes, maintain minimum ballast depth requirements, and ensure accurate cross-section dimensions.

Supports both metric (meters) and imperial (feet) units, with automatic alignment to the active drawing unit system.

Note: This app uses a custom installer rather than the standard Autodesk App Store installer.