This subassembly creates a crowned lane that has separate subbase slope control, as well as the ability to control the subbase crown location by specifying a target alignment.
The attachment point is at the beginning of the first link. The subassembly is sensitive to the direction being inserted. Positive widths increase the offset from the attachment point in the direction inserted.
Note: All dimensions are in meters or feet unless otherwise noted. All slopes are in run-over-rise form (for example, 4 : 1) unless indicated as a percent slope with a “%” sign.
This section lists the parameters in this subassembly that can be mapped to one or more target objects, such as a surface, alignment, or profile object in a drawing. For more information, see in the AutoCAD Civil 3D User’s Guide Help.
| Parameter | Description | Status |
|---|---|---|
| Left Width | May be used to override the fixed left lane Width and tie the edge-of-lane to an offset alignment. The following object types can be used as targets for specifying this width: alignments, polylines, features lines, or survey figures. | Optional |
| Left Outside Elevation | May be used to override the normal lane slope and tie the outer edge of the left travel lane to the elevation of a profile. The following object types can be used as targets for specifying this: profiles, 3D polylines, feature lines, or survey figures. | Optional |
| Right Width | May be used to override the fixed right lane Width and tie the edge-of-lane to an offset alignment. The following object types can be used as targets for specifying this width: alignments, polylines, features lines, or survey figures. | Optional |
| Right Outside Elevation | May be used to override the normal lane slope and tie the outer edge of the right travel lane to the elevation of a profile. The following object types can be used as targets for specifying this: profiles, 3D polylines, feature lines, or survey figures. | Optional |
| Base Centerline | May be used to override the crown location of the base and subbase materials. The following object types can be used as targets for specifying this: alignments, polylines, features lines, or survey figures. | Optional |
| Parameter | Description | Type |
|---|---|---|
Superelevation Axis of Rotation |
Indicates whether the subassembly supports the axis of rotation calculation. To view a description of the parameter, in the Properties window, hover the cursor over the parameter. For more information, see Profile Grade Line Adjustments During Superelevation. |
Static (Description) |
| Left Lane %Slope | % slope of the Left Lane | Numeric |
| Right Lane % Slope | % Slope of Right Lane | Numeric |
The Inside Lane superelevation slope is obtained from the superelevation specifications for the baseline alignment. Starting at the attachment point, a finish grade surface and parallel subgrade are inserted using the given width, depth, and the superelevation slope. Vertical links close the shape at either end of the lane.
If an offset horizontal alignment name is assigned to the Left or Right width during corridor modeling, the width of the lane will vary to match the offset of the alignment.
If an alignment is specified for base centerline then the crown point of the base and subbase layers will shift to the location of this alignment.
The following table lists the point, link, and shape codes for this subassembly that have codes assigned to them. Point, link, or shape codes for this subassembly that do not have codes assigned are not included in this table.
