This subassembly creates a cross-sectional representation of a travel lane, applying the Outside Lane superelevation slope value for the corridor model’s baseline alignment.
It is used for most undivided roads, or divided roads with no lane slope break on either side. It may also be used for the outside lanes of divided crowned or 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 either (a) at the inside edge of lane on finished grade, if the insertion point is Crown, or (b) at the outside edge of travel way,if the insertion point is at the edge of travel way. 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 |
|
Insertion Point |
Specifies insertion point of the lane either at the crown, or at the edge of travel way |
List of options: Crown, Edge of Travel Way |
Crown |
|
Crown Point on Inside |
Specifies that inside edge of travelway 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 |
|
Base Depth |
Thickness of the base layer (zero to omit) |
Numeric, positive |
0.100 m 0.333 ft |
|
Default Slope |
Default slope of the lane to be used when the superelevation slope for 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 |
|
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 Outside 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 all lane links using the width and depth input parameters at a -2% slope.
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 |
Crown |
Crown point on finish grade (optional) |
|
P2 |
ETW |
Inside edge of lane on finish grade |
|
P3 |
Crown_Pave1 |
Crown point on the Pave1 layer (optional) |
|
P4 |
ETW_Pave1 |
Inside edge of lane on Pave. |
|
P5 |
Crown_Pave2 |
Crown point on the Pave2 layer (optional) |
|
P6 |
ETW_Pave2 |
Inside edge of lane on Pave2 |
|
P7 |
Crown_Base |
Crown point on base grade (optional) |
|
P8 |
ETW_Base |
Inside edge of lane on Base |
|
P9 |
Crown_Sub |
Crown point on subbase grade (optional) |
|
P10 |
ETW_Sub |
Inside edge of lane on Subbase |
|
L1 |
Top, Pave |
Finish grade surface |
|
L2 |
Pave1 |
Pave1 surface |
|
L3 |
Pave2 |
Pave2 surface |
|
L4 |
Base |
Base surface |
|
L5 |
SubBase Datum |
Subbase surface |
|
S1 |
Pave1 |
Area between finish grade and Pave1 |
|
S2 |
Pave2 |
Area between Pave1 and Pave2 |
|
S3 |
Base |
Area between Pave2 and Base |
|
S4 |
SubBase |
Area between Base and Subbase |
Coding Diagram
