┌──────────────────────────────────────────────────────────────┐ │ SUBASSEMBLY COMPOSER CORE │ ├──────────────────────────────┬───────────────────────────────┤ │ Input Parameters │ Target Parameters │ │ • LaneWidth (Default: 3.6m) │ • SurfaceTarget (EG) │ │ • FlangeSlope (Default: -2%) │ • WidthTarget (Alignment) │ │ • CurbHeight (Default: 0.15m)│ • ElevationTarget (Profile) │ ├──────────────────────────────┴───────────────────────────────┤ │ Output Codes │ │ • Point Codes: Crown, EdgeOfTravelWay, Flange, BackOfCurb │ │ • Link Codes: Top, Datum, Subbase, Curb │ │ • Shape Codes: Pave1, Pave2, Base, Subbase, Concrete │ └──────────────────────────────────────────────────────────────┘ Standardized Coding Conventions

You can find high-quality, free subassemblies through official channels and community-led repositories:

The primary value of free PKT downloads lies in their ability to solve specialized design challenges that the "out-of-the-box" tools cannot. For instance, standard curb and gutter components may not account for regional municipal standards or complex daylighting scenarios. By downloading pre-made PKT files, users can implement advanced logic—such as conditional targets or multi-layered pavement structures—immediately. This modularity allows for greater flexibility; once a PKT is imported into the Civil 3D Tool Palette, it behaves like a native component, responding to assemblies and targets within the corridor model.