Understanding Corridor Template Instructions
After you have created and inserted a cross-section template into a corridor as described in Create Corridor Templates, you can define instructions that specify what that the template looks like (for example, the various offsets and slopes for a road).
Corridor templates are made up of nodes and instructions. Nodes are used to define the various offsets and slopes in the templates. For example, a simple road corridor might contain three nodes: a centerline based on the alignment (1), a right edge of pavement (2), and a left edge of pavement (3).
The software automatically creates nodes based on the alignment and reference lines in your corridor. For example, node 1 in the figure above was automatically created as the centerline for the corridor based on the corridor's alignment. Using instructions, you can create additional nodes as necessary to define offsets and slopes for other corridor features. For example, node 2 in the figure above was manually created to represent the right edge of the pavement with an offset of 5m and a slope of -2% relative to the centerline. To create a node manually, you define the instructions that specify the node's offset and slope relative to other nodes in the template. For more information, see Corridor Template Node Types.
When you create nodes, you typically associate them with one or more material layers in the corridor (for example the "Finished" layer). If the node is associated with a layer that is designated as the "current material layer" for the corridor, the line segment created by the node displays in the Plan View and 3D View. In addition, the line segment is used to build the corridor surface for exporting.
For instructions on creating, importing, inserting, mirroring, and exporting instructions into a corridor template, see Create Corridor Template Instructions.
Corridor Intersections and Cul-de-Sacs
For information on the relationship between corridor template instructions and corridor intersections and cul-de-sacs, see Type of code above in Create Corridor Template Instructions and Understanding Corridor Intersections and Cul-de-Sacs.
