Corridors aren't just for roads

Corridors can appear incredibly complex upon first glance.  Assemblies, subassemblies, targets, etc -- it can be a lot to digest at first for a first time corridor user.  However, it is a subject quickly tackled if one can reference previously set up models.

Assemblies, subassemblies, and corridors are all treated as seperate civil 3D objects.  Each and every one you create of these three is an individual entity with its own unique name.

Assemblies represent an entire stream cross section.

Sub-Assemblies are used to model individual line segments of the stream cross section.

Corridors manipulate assemblies via profile and alignment targets.  This allows unlimited control of the stream modeling.