About Corridor Modeling

You can use Autodesk Civil 3D corridor modeling to create flexible and configurable 3D models of corridors, such as roads, highways, and railways.

A corridor model builds on and uses various Autodesk Civil 3D objects and data, including subassemblies, assemblies, surfaces, feature lines, alignments, and profiles. The corridor manages the data, tying various assemblies (applied for different ranges of stations) to the baselines and their finished grade profiles.

Corridors persist in a drawing as objects with the name AeccCorridor. Corridor objects include corridor body geometry, longitudinal feature lines, embedded surfaces, rendering support, and slope hatching support.

A corridor can define and display components, such as:

A corridor object is created from a baseline (alignment or feature line) by placing 2D sections (assemblies) at incremental locations, and by creating matching slopes that reach a surface model at each incremental location.

You can create corridors with multiple baselines, which enables you to create more complex designs, such as intersections.

Note: There is no limit to the number of alignments that can be used to define an Autodesk Civil 3D corridor.

Corridors are created from and based on existing Autodesk Civil 3D objects, which include:

After you have created a corridor, you can extract data from it, including surfaces, feature lines (as polylines, alignments, profiles, and grading feature lines), and volume (quantity takeoff) data.

Note: There is no limit to the number of feature lines that can be created at a Autodesk Civil 3D corridor station or range of stations.

Corridors have their own display style and also inherit styles from their components.

Managing and Editing Corridors

A corridor is defined by at least one baseline and an assembly that is applied for a range of stations on that baseline. In many cases, corridors will have different assemblies at different stations, depending on the existing ground and other design considerations. Also, it may be necessary to build a corridor model that is controlled by multiple baselines, for example, one that includes intersection objects. To add and edit this type of complexity, you can use the Parameters tab of the Corridor Properties dialog box, where you can modify the associated baselines and assemblies, change assembly frequency and range, and update targets.

You can use the Corridor Properties dialog box to view and or change:

Many corridor editing commands can also be accessed on the Corridor ribbon tab.

To display the Corridor tab in the ribbon, do one of the following:

Note: You cannot copy a corridor.

Corridor Modeling Workflow

Corridors Tutorials

Corridor Design Best Practices