This subassembly creates a cross-sectional representation of finish grade, base layer, and subbase layer for a travel lane, applying the Inside Lane superelevation slope value for the corridor model’s baseline alignment.
It 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 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 |
|
Width |
Width of the lane from the offset of the inside edge to the offset of the outside edge |
Numeric, positive |
3.6 m 12.0 ft |
|
Default %Slope |
Default % Slope of the lane to be used when the superelevation slope of the alignment is not defined |
Numeric |
-2.0 |
|
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 |
|---|---|---|
|
Width |
May be used to override the fixed lane Width and tie the edge-of-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 Elevation |
May be used to override the normal lane slope and tie the outer edge of the travel 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 |
|---|---|---|
|
Lane Width |
Width of the lane |
Numeric |
|
Lane %Slope |
% slope of the 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 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 lane links using the given width and depths at a slope of -2%.
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 |
ETW |
Edge-of-traveled-way on finish grade |
|
P1 |
Crown |
Crown point on finish grade (optional) |
|
P2 |
Lane |
Outside edge of lane on finish grade |
|
P3 |
ETW_Pave1 |
Edge-of-traveled-way on the Pave1 layer |
|
P3 |
Crown_Pave1 |
Crown point on the Pave1 layer (optional) |
|
P4 |
Lane_Pave1 |
Outside edge of lane on the Pave1 layer |
|
P5 |
ETW_Pave2 |
Edge-of-traveled-way on the Pave2 layer |
|
P5 |
Crown_Pave2 |
Crown point on the Pave2 layer (optional) |
|
P6 |
Lane_Pave2 |
Outside edge of lane on the Pave2 layer |
|
P7 |
ETW_Base |
Edge-of-traveled-way edge of lane on the Base layer |
|
P7 |
Crown_Base |
Crown point on base layer (optional) |
|
P8 |
Lane_Base |
Outside edge of lane on the Base layer |
|
P9 |
ETW _Sub |
Edge-of-traveled-way edge of lane on the subbase layer |
|
P9 |
Crown_Sub |
Crown point on subbase layer (optional) |
|
P10 |
Lane_Sub |
Outside edge of lane on the Subbase layer |
|
L1 |
Top, Pave |
Finish grade surface |
|
L2 |
Pave1 |
|
|
L3 |
Pave2 |
|
|
L4 |
Base |
Base surface |
|
L5 |
SubBase Datum |
Subbase surface |
|
S1 |
Pave1 |
|
|
S2 |
Pave2 |
|
|
S3 |
Base |
|
|
S4 |
SubBase |
Coding Diagram
