This subassembly creates a cross-sectional representation of travel lanes for a broken-back roadway, where the inside and outside lanes have different downward slopes.
This subassembly is used for the inside lanes on divided, broken-back highways. The pavement structure follows the standards described in “Pavement Structure on Paved Sections” in the Autodesk Civil 3D User’s Guide Help.
Attachment
The attachment point is at the inside edge of lane on the finish grade surface. This component can be attached to either the left or right side.
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 |
|---|---|---|---|
|
Side |
Specifies which side to place the subassembly |
Left / Right |
Right |
|
Crown Point on Inside |
Specifies that inside edge of travelway to be coded as Crown |
Yes / No |
No |
|
Inside Width |
Width of the inside lanes |
Numeric, positive |
3.6 m 12.0 ft |
|
Inside Default %Slope |
Default % Slope of the inside lanes to be used if the superelevation for the alignment is not defined |
Numeric |
- 2.0 (%) |
|
Outside Width |
Width of the outside lanes |
Numeric, positive |
3.6 m 12.0 ft |
|
Outside Default %Slope |
Default % Slope of the outside lanes to be used if the superelevation for the alignment is not defined |
Numeric |
- 2.5 (%) |
|
Pave1 Depth |
Thickness of the Pave1 layer (zero to omit) |
Numeric, non-negative |
0.025 m 0.083 ft |
|
Pave2 Depth |
Thickness of the Pave2 layer (zero to omit) |
Numeric, non-negative |
0.025 m 0.083 ft |
|
Base Depth |
Thickness of the Base layer (zero to omit) |
Numeric, non-negative |
0.100 m 0.333 ft |
|
Subbase Depth |
Thickness of the Subbase layer (zero to omit) |
Numeric, non-negative |
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. For more information, see To Specify Corridor Targets.
|
Parameter |
Description |
Status |
|---|---|---|
|
Inside Width |
May be used to override the fixed Inside Width and tie the edge-of-inside-lane to an offset alignment. The following object types can be used as targets for specifying the width: alignments, polylines, feature lines, or survey figures. |
Optional |
|
Outside Width |
May be used to override the fixed Outside Width and tie the edge-of-outside-lane to an offset alignment. The following object types can be used as targets for specifying the width: alignments, polylines, feature lines, or survey figures. |
Optional |
|
Inside Elevation |
May be used to override the normal slope and tie the elevation of the edge-of-inside-lane to the elevation of a profile. The following object types can be used as targets for specifying the elevation: profiles, 3D polylines, feature lines, or survey figures. |
Optional |
|
Outside Elevation |
May be used to override the normal slope and tie the elevation of the edge-of-outside-lane to the elevation of a profile. The following object types can be used as targets for specifying the elevation: profiles, 3D polylines, feature 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) |
|
Inside Lane Width |
Width of the inside lane |
Numeric |
|
Inside %Slope |
% slope of the inside lane |
Numeric |
|
Outside Lane Width |
Width of the outside lane |
Numeric |
|
Outside %Slope |
% slope of the outside lane |
Numeric |
Behavior
This subassembly creates a set of inside lanes and outside lanes that may have different slopes. The inside lanes are inserted outwards from the attachment point using the Inside Lane superelevation slope. If the superelevation is not defined at a station, the Inside Default %Slope value is used. The outside lanes are inserted outward from the end of the inside lanes, using the outside lane superelevation slope, or the Outside Default %Slope.
If an offset horizontal alignment name is assigned to the Width during corridor modeling, the width of the lane will vary to match the offset of the alignment.
Layout Mode Operation
In layout mode, this subassembly displays the finish, base, and subbase links for the given widths and depths at the default % slopes.
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 |
Code |
Description |
|---|---|---|
|
P1, P3 |
ETW |
Edges of lane on finish grade |
|
P1 |
Crown |
Crown point of the corridor (optional) |
|
P2 |
Lane |
Lane breakpoint on finish grade |
|
P4, P6 |
ETW_Pave1 |
Edges of lane on Pave1 |
|
P4 |
Crown_Pave1 |
Crown point on Pave1 (optional) |
|
P5 |
Lane_Pave1 |
Lane break point on Pave1 |
|
P7, P9 |
ETW_Pave2 |
Edges of lane on Pave2 |
|
P7 |
Crown_Pave2 |
Crown point on Pave2 (optional) |
|
P8 |
Lane_Pave2 |
Lane break point on Pave2 |
|
P10, P12 |
ETW_Base |
Edges of lane on the Base layer |
|
P10 |
Crown_Base |
Crown point on base layer (optional) |
|
P11 |
Lane_Base |
Lane break point on the Base layer |
|
P13, P15 |
ETW _Sub |
Edges of lane on the Subbase layer |
|
P13 |
Crown_Sub |
Crown point on subbase layer (optional) |
|
P14 |
Lane_Sub |
Lane break point on the Subbase layer |
|
L1, L2 |
Top, Pave |
Finish grade surface |
|
L3, L4 |
Pave1 |
|
|
L5, L6 |
Pave2 |
|
|
L7, L8 |
Base |
|
|
L9, L10 |
SubBase Datum |
|
|
S1 |
Pave1 |
|
|
S2 |
Pave2 |
|
|
S3 |
Base |
|
|
S4 |
SubBase |
Coding Diagram
