About Rehab Corridor Modelling

You can use Autodesk Civil 3D rehab corridor modelling to optimise the crossfall of rehab corridors, such as roads and highways.

Just like any other Autodesk Civil 3D corridor model, a rehab corridor model builds on and uses various Autodesk Civil 3D objects and data, including subassemblies, alignments, profiles, surfaces and targets. The rehab corridor manages the data, tying various rehab subassemblies (applied for different ranges of chainages) to the baselines and their finished gradient profiles.

Once you have created your rehab corridor model, the corridor name is displayed in the Corridors collection on the Prospector tab. You can perform any edits on it that you would perform on a standard corridor model. You can add additional non-rehab subassemblies to your rehab corridor as well. See About Subassemblies for more information.

Similarly, the downstream operations that are available for a standard corridor model are available for a rehab corridor model. For example, you can:

• Create sections of a rehab corridor to display in section view.
• Extract feature lines or solids from a rehab corridor.
• Create surfaces from a rehab corridor.
• Create data references for a rehab corridor.

You can review About Corridor Modelling for more information.

However, the workflow to create a rehab corridor is slightly different from the standard workflow used to create other corridor models. To create a rehab corridor object, you must specify a corridor style, corridor layer, a baseline (alignment and profile), rehab region start and end chainages and a target surface. Next, you'll use the Rehab Parameters palette to specify lane inputs and properties and modify the rehab input parameters such as crossfall adjustments and milling and levelling parameters. Once you apply rehab parameters to your rehab corridor, Autodesk Civil 3D will automatically build the rehab assembly for your rehab corridor and will automatically assign the appropriate rehab and/or crossfall optimisation subassemblies to your rehab corridor regions. You can review the assembly that was created when you applied rehab parameters to the rehab corridor, in the Corridor Properties dialog box. You can also review the rehab subassemblies that were assigned to the rehab assembly for your rehab corridor in the Assembly Properties dialog box.

Autodesk Civil 3D will choose from the following Rehab and/or Cross Slope Optimisation Subassemblies when assigning subassemblies to your rehab corridor. Note that there are both crowned and planar (also known as uncrowned) rehab and/or crossfall subassemblies available:

• Overlay_Level_1Lane_1Side
• Overlay_Mill_Level_1Lane_1Side
• Overlay_Mill_1Lane_1Side
• Overlay_Level_Crown
• Overlay_Mill_Level_Crown
• Overlay_Mill_Crown

Rehab Corridor Editor ribbon tab

When you select a rehab region within a rehab corridor, the Rehab Corridor Editor ribbon tab is displayed and the Rehab Parameters palette is automatically docked to the right side of your Autodesk Civil 3D application window. See To Edit An Existing Rehab Corridor for information on creating and/or selecting rehab corridor regions.

Using the Rehab Corridor Editor ribbon tab, you can:

• Add rehab regions to your rehab corridor.
• Navigate between chainages in the selected rehab corridor region.
• Open the Rehab Parameters palette.
• Open the Rehab Manager, modify accepted slope and generate reports.
• Modify the Chainage Tracker line display in your viewports.
• Configure Chainage Tracker options.
• Zoom to extents, zoom to an offset and level zoom to a subassembly.
• Modify View/Edit Corridor Section options.
• Modify default Rehab Corridor Editor viewport configuration.
• Modify the display of objects.

Managing and Editing Rehab Corridors

A rehab corridor is defined by at least one baseline and a range of chainages on that baseline. In many cases, rehab corridor assemblies will have different subassemblies at different chainages, depending on the existing ground, vertical adjustment parameters, crossfall adjustment, milling and levelling parameters and other design considerations. You can use the Rehab Parameters palette to modify lane parameters and input parameters, adjust crossfall adjustment parameters and milling and levelling parameters for selected rehab corridor regions. Once you apply Rehab Parameters to a selected rehab corridor region, any design geometry violations associated with the parameters you have defined will be indicated graphically on each section. Hover over a violation icon in the cross section view to review violations. You can also use the Rehab Manager to review parameters and modify accepted crossfall values to meet design requirements on a section-by-section basis. See To Edit an Existing Rehab Corridor for more information.

Note: It's not supported to copy lane parameters between rehab regions.

Rehab Corridor Section Views

When editing an existing rehab corridor region, by default Autodesk Civil 3D will display three custom viewports that can be used to review and/or modify parameters on a section-by-section basis to meet design requirements for selected chainages within your rehab corridor regions. See About Rehab Corridor Sections for more information.

Generating Rehab Reports

You can use the Rehab Manager to generate Crossfall Correction and Milling and Levelling reports for selected chainages within your rehab corridor regions. The Rehab Manager can also be used to review violations to design geometry requirements and modify rehab parameters on a section-by-section basis. See To Generate Rehab Corridor Reports for more information.