OverlayWidenWithSuper1

Attachment

The attachment point is at the inside edge of the top of the overlay layer if the Overlay Depth is non-zero, or at the inside edge on finish grade of the widening lane if the Overlay Depth is zero.

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
Control Point Offset	Offset of the control point, which defines the beginning of the pavement overlay layer	Numeric	0.0
Insert Point Offset	Offset of the insertion point of the widening lane, which is typically at the existing edge-of-traveled-way. Specifying a positive value for the this parameter inserts this subassembly on the right side of a corridor, or controlling baseline. A negative value inserts it on the left side. For more information, see "Inserting Subassemblies on Right and Left Sides of a Corridor" in the Corridors chapter of the Autodesk Civil 3D User's Guide Help.	Numeric	0.0
Overlay Depth	Depth of the overlay above the existing finish grade at the control point.	Numeric, positive	0.100 m 0.30 ft
Width	Width of the widening lane	Numeric, positive	3.6 m 12.0 ft
Pave1 Depth	Thickness of the Pave1 layer for the lane widening; zero to omit	Numeric, positive	0.025 m 0.083 ft
Pave2 Depth	Thickness of the Pave2 layer for the lane widening; zero to omit	Numeric, positive	0.025 m 0.083 ft
Base Depth	Thickness of the base layer for the lane widening	Numeric, positive	0.100 m 0.333 ft
Subbase Depth	Thickness of the subbase layer for the lane widening	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
Existing Surface	Name of the Surface defining the existing roadway. The following object types can be used as targets for specifying this surface: surfaces.	Required
Control Point Offset	May be used to override the fixed Control Point Offset and tie the point to an offset alignment. The following object types can be used as targets for specifying this offset: alignments, polylines, feature lines, or survey figures.	Optional
Insert Point Offset	May be used to override the fixed Insert Point Offset and tie the point to an offset alignment. The following object types can be used as targets for specifying this offset: alignments, polylines, feature lines, or survey figures.	Optional
Width	May be used to override the fixed widening lane Width and tie the edge-of-lane to an offset alignment. The following object types can be used as targets for specifying this offset: alignments, polylines, feature lines, or survey figures.	Optional

Output Parameters

Parameter	Description	Type
%Slope	The calculated slope on the existing surface from the Sample Point to the Insert Point	Numeric

Behavior

The outside lane superelevation is obtained from the alignment properties of the current control alignment, and the elevation on the Existing Surface at the Control Point Offset is determined.

If a non-zero Overlay Depth is given, the overlay depth is applied at the control point. The top of the overlay layer extends to the Insert Point Offset at the superelevation slope, and the overlay shape is closed by superimposing links over the Existing Surface between the control and insert points and adding vertical links at each end. The widening lane is extended outward at the superelevation slope for the given Width from the edge of the overlay surface.

If the Overlay Depth is zero, the widening lane extends outward from the Insert Point Offset on the Existing Surface at the superelevation slope for the given Width.

The pavement layers are closed with vertical links at each end. A single verttical link is also placed from the inside edge of Subbase to the existing surface.

Layout Mode Operation

In layout mode, this subassembly may be attached to any convenient point. The overlay layer is shown at a uniform depth, with a width of 3.6 meters or 12 feet and extended at a slope of -2%. If the Overlay Depth is zero, the overlay is shown as a single link. The widening lane extends from the edge-of-overlay at a slope of -2%.

When used in corridor modeling mode, the shapes adjust to the selected control point, insert point, superelevation slope, and existing surface.

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
P5	ETW	Outside edge of widening lane on finish grade
P7	ETW_Pave1	Outside edge of widening lane on Pave1
P9	ETW_Pave2	Outside edge of widening lane on Pave2
P11	ETW_Base	Outside edge of widening lane on Base
P13	ETW_Sub	Outside edge of widening lane on Subbase
L1, L5	Top, Pave	Finish grade surface
L2	Overlay	Superimposed over links on the Existing Surface. Note that there may be more than a single link between points P3 and P4.
L6	Pave1
L7	Pave2
L8	Base
L9	SubBase, Datum
L10	Datum
S1	Overlay	Area between the overlay and existing lane.
S2	Pave1
S3	Pave2
S4	Base
S5	SubBase