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.
Attachment
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.
Input Parameters
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.
| Parameter | Description | Type | Default |
|---|---|---|---|
| Left Lane Width | Width of the left lane from the offset of the inside edge to the offset of the outside edge | Numeric, positive |
3.6 m 12.0 ft |
| Right Lane Width | Width of the right lane from the offset of the inside edge to the offset of the outside edge | Numeric, positive |
3.6 m 12.0 ft |
| Default % Left Slope | Default % Left Slope of the lane to be used when the superelevation slope of the alignment is not defined | Numeric | -2.0 |
| Default % Right Slope | Default % Right Slope of the lane to be used when the superelevation slope of the alignment is not defined | Numeric | -2.0 |
| Base % Slope | Specifies the slope of the base and subbase materials. In superelevation will be calculated as the difference between Default slope and base slope, then added to Superelevation value. | Numeric | -3.0 |
| Pave1 Depth | Thickness of the Pave1 layer (zero to omit) | Numeric, positive |
0.025 m 0.083 ft |
| Pave2 Depth | Thickness of the Pave2 layer (zero to omit) | Numeric, positive |
0.025 m 0.083 ft |
| Base Depth | Thickness of the Base layer at crown | Numeric, positive |
0.100 m 0.333 ft |
| Subbase Depth | Thickness of the Subbase layer | Numeric, positive |
0.300 m 1.0 ft |
Target Parameters
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 To Specify Corridor Targets.
| 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 |
Output Parameters
| 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 |
Behavior
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.
Layout Mode Operation
In layout mode, this subassembly displays the links defined by the input parameters.
Point, Link, and Shape Codes
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.
| Point, Link, or Shape | Codes | Description |
|---|---|---|
| P1/P3 | ETW | Edge-of-traveled-way on finish grade |
| P2 | Crown | Crown point on finish grade |
| P1/P3 | Lane | Outside edge of lane on finish grade |
| P4/P6 | ETW_Pave1 | Edge-of-traveled-way on the Pave1 layer |
| P5 | Crown_Pave1 | Crown point on the Pave1 layer |
| P4/P6 | Lane_Pave1 | Outside edge of lane on the Pave1 layer |
| P7/P9 | ETW_Pave2 | Edge-of-traveled-way on the Pave2 layer |
| P8 | Crown_Pave2 | Crown point on the Pave2 layer |
| P7/P9 | Lane_Pave2 | Outside edge of lane on the Pave2 layer |
| P11/P13 | ETW_Base | Edge-of-traveled-way edge of lane on the Base layer |
| P12 | Crown_Base | Crown point on base layer (optional) |
| P11/P13 | Lane_Base | Outside edge of lane on the Base layer |
| P14/P16 | ETW _Sub | Edge-of-traveled-way edge of lane on the subbase layer |
| P15 | Crown_Sub | Crown point on subbase layer (optional) |
| P14/P16 | Lane_Sub | Outside edge of lane on the Subbase layer |
| L1 ,L2 | Top, Pave | Finish grade surface |
| L3,L4 | Pave1 | |
| L5,L6 | Pave2 | |
| L7,L8 | Base | Base surface |
| L9,L10 |
SubBase Datum |
Subbase surface |
| S1 | Pave1 | |
| S2 | Pave2 | |
| S3 | Base | |
| S4 | SubBase |
Coding Diagram
