OverlayLevel1Lane1Side

This subassembly overlays one side of an existing carriageway, with a levelling layer added as required.

Attachment

The attachment point is the inside edge point of the overlay layer with finished gradient crossfall.

Input Parameters

Note: All dimensions are in metres 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 of the road centreline to place the subassembly.	Left/Right	Right
Overlay Depth	Depth of the overlay layer.	Numeric	0.300m (0.300 ft)
Design Lane Width same as Existing Lane Width	Yes Specifies that the design lane width is the same as existing lane width. No Specifies that the design lane width is not the same as existing lane width. Note: If No is selected, the Inside Edge of Existing Lane and Outside Edge of Existing Lane parameters will not be applied to the subassembly.	User defined	No
Inside Edge of Existing Lane	This is the start point for calculating existing ground slope.	Numeric	0.000m (0.000 ft)
Outside Edge of Existing Lane	This is the end point for calculating existing ground slope.	Numeric	12.000m (12.000 ft)
Overlay Slope Options	Specifies overlay slope options. Tip: Flapping is a term used to describe how the corrected cross slope for an overlay in a rehab subassembly is calculated. Flapping outcomes are different, relative to the slope tolerance and the slope difference between existing ground cross slope and ideal cross slope. If the slope difference is less than the slope tolerance for the subassembly, then the use case is considered "within tolerance". If the slope difference is greater than the slope tolerance for the subassembly, then the use case is considered "outside of tolerance". Note: Slope tolerance is an absolute value. Therefore, for either a slope difference of 0.4% or -0.4%, both have an absolute value of 0.4%. If the slope tolerance is 0.5%, the 0.4% absolute slope difference would be considered within tolerance. User Defined with Flapping Flapping specifies how the corrected cross slope will be calculated, relative to the slope tolerance for the subassembly. Flapping Within Tolerance: The corrected cross slope will be the existing ground cross slope. Flapping Outside of Tolerance: The corrected cross slope will vary and will be the existing ground cross slope plus or minus the slope tolerance value. Note: Whether the slope tolerance is added or subtracted depends on which one will bring the values of the existing ground cross slope and the ideal cross slope closer together. User Defined Without Flapping Flapping specifies how the corrected cross slope will be calculated, relative to slope tolerance for the subassembly. Flapping Within Tolerance: The corrected cross slope will be set equal to the ideal cross slope. Flapping Outside of Tolerance: The corrected cross slope will be the ideal cross slope plus or minus the slope tolerance value. Note: Whether the slope tolerance is added or subtracted depends on which one will bring the values of the existing ground cross slope and the ideal cross slope closer together. Outside/Inside Lane Superelevation Outside or Inside Lane Superelevation will replace Ideal Crossfall. The corrected cross slope values for the overlay layer will be defined by the superelevation table for the section instead of the ideal cross slope. Note: If Outside/Inside Lane Superelevation is chosen but the alignment for the rehab corridor doesn't have a superelevation table defined, Ideal Crossfall will be used instead. Within Tolerance: If a superelevation table is defined for the alignment: The corrected cross slope will be the lane superelevation value obtained from the superelevation table. If a superelevation table is not specified for the alignment: The corrected cross slope will be the specified ideal slope. Note: This behaviour is the same as for the User Defined without Flapping option. Outside of Tolerance: If a superelevation table is defined for the alignment: The corrected cross slope will be the lane superelevation value obtained from the superelevation table plus or minus the slope tolerance value. If a superelevation table is not specified for the alignment: The corrected cross slope will be the specified ideal slope plus or minus the slope tolerance value. Note: This behaviour is the same as for the User Defined without Flapping option. Match Slope The corrected cross slope is always set equal to Existing Ground Slope. Use Ideal Crossfall The corrected cross slope is always set equal to Ideal Cross slope.	User Defined	Match slope
Ideal Crossfall	Specifies user-defined ideal crossfall.	Numeric	-2.00%
Lane Width	The lane width, determined by the offset of the outside edge of lane from the inside edge of lane.	Numeric	0.000m (0.000 ft)
Use Profile Options	Select to tie the inside edge of the overlay layer to a profile, adjust elevation to minimum level depth or lock to previous subassembly. Minimum Level Depth The crossfall and level adjustments will meet Minimum Level and/or Minimum Mill Depth. The base is the existing surface. Use Profile There will be no level adjustment. The level of the rehab subassembly attachment point will match the assigned profile. The crossfall adjustment will be determined by Overlay Slope Options. Lock to Preceding There will be no level adjustment. The level of the rehab subassembly attachment point will match the attachment point of the preceding subassembly (in most cases this will be the preceding lane's end point). The crossfall adjustment will be determined by Overlay Slope Options.	User defined	Minimum Level Depth
Minimum Level Depth	The minimum level depth between the existing surface and the bottom of the overlay layer.	Numeric	0.300m (0.300 ft)
Slope Tolerance	The amount that the overlay crossfall is allowed to vary from the existing ground crossfall or the ideal crossfall.	Numeric, positive	0.50%

General Input Parameters

Flapping

Note: Flapping outcomes are different, relative to the Slope Tolerance and the Slope Difference between existing ground crossfall and ideal crossfall.

Inside Edge of Lane Offset

Lock to Preceding 1

In this use case the second lane is set to use the Lock to Previous option. The attachment point for Lane 2 will lock to the elevation of the end of Lane 1. The level depth at the start of the second lane is greater than the minimum level depth specified for that lane.

The corrected cross slope will be calculated and applied, but no elevation adjustment or flapping will be applied. In some cases, the minimum level depth might not be met.

Lock to Preceding 2

In this use case the second lane is set to use the Lock to Previous option. The attachment point for Lane 2 will lock to the subassembly of Lane 1. The level depth at the start of the second lane is less than minimum level depth specified for that lane.

The corrected cross slope will be calculated and applied, but no elevation adjustment or flapping will be applied. In some cases, the minimum level depth might not be met.

Minimum Level Depth

Outside Lane Superelevation

The ideal crossfall is equal to the outside lane superelevation.

Note: A superelevation table for the alignment is required to read these values. Superelevation values will be read from the superelevation table for the alignment.

Output Parameters

Parameter	Description	Type	Default
Corrected Crossfall	This is the adjusted crossfall for the road, which has been optimised to match, as closely as possible, the rehab subassembly parameters you specified.	Numeric	-2.00%
Existing Ground Slope	The crossfall (%) of the existing ground profile, calculated from the inside edge of the lane to the outside edge of the lane.	Numeric	percentage

Target Parameters

Parameter	Description	Required?
Target Surface	Name of the surface defining the existing carriageway	Yes
Crown Offset Target	Name of the object defining the offset of the crown point. The following object types can be used as targets for specifying this offset: alignments, polylines, feature lines or survey figures.	No
Inside Edge of Lane Offset Target	Name of the object defining the offset of the inside edge of lane. The following object types can be used as targets for specifying this offset: alignments, polylines, feature lines or survey figures.	No
Lane Width Target	Name of the object defining the offset of the outside edge of lane. The following object types can be used as targets for specifying this offset: alignments, polylines, feature lines or survey figures.	No
Inside Edge of Existing Lane Offset Target	Name of the object defining the inside sample point offset will be used to calculate the existing surface slope. The following object types can be used as targets for specifying this offset: alignments, polylines, feature lines or survey figures.	No
Outside Edge of Existing Lane Offset Target	Name of the object defining the outside sample point offset will be used to calculate the existing surface slope. The following object types can be used as targets for specifying this offset: alignments, polylines, feature lines or survey figures.	No

Behaviour

This subassembly assumes that no milling layer is added.

Case 1-1: Ideal Crossfall is greater than Existing Ground Crossfall

Inputs:

Inputs
Ideal Crossfall	-2.0%
Minimum Level Depth	0
Slope Tolerance	0.50%
Overlay Slope Options	User Defined with Flapping
Use Profile Options	Minimum Level Depth
Inside Edge of Lane Offset	true (values vary)
Outside Edge of Lane Offset	true (values vary)

Calculations:

Input	Value
Existing Ground Crossfall	-3.0%
Existing Ground Crossfall – Ideal Crossfall	-1.0%
Slope Tolerance	Existing Ground Slope minus Ideal Crossfall is -1%, which is greater than the 0.5% Slope Tolerance
Corrected Crossfall	The Corrected Cross slope will be adjusted to -2.5%

Output	Value
Corrected Crossfall	-2.5%

Case 1-2: Ideal Crossfall is greater than Existing Ground Crossfall

Inputs:

Inputs
Ideal Crossfall	-2.5%
Minimum Level Depth	0
Slope Tolerance	0.50%
Overlay Slope Options	User Defined with Flapping
Use Profile Options	Minimum Level Depth
Inside Edge of Lane Offset	true (values vary)
Outside Edge of Lane Offset	true (values vary)

Calculations:

Input	Value
Existing Ground Crossfall	-2.9%
Existing Ground Crossfall – Ideal Crossfall	-0.4%
Slope Tolerance	Existing Ground Slope minus Ideal Crossfall is -0.4%, which is less than the 0.5% Slope Tolerance.
Corrected Crossfall	The Corrected Cross slope will be -2.9%

Output	Value
Corrected Crossfall	-2.9%

Case 1-3: Ideal Crossfall is less than Existing Ground Crossfall

Inputs:

Inputs
Ideal Crossfall	-2.0%
Minimum Level Depth	0
Slope Tolerance	0.50%
Overlay Slope Options	User Defined with Flapping
Use Profile Options	Minimum Level Depth
Inside Edge of Lane Offset	true (values vary)
Outside Edge of Lane Offset	true (values vary)

Calculations:

Input	Value
Existing Ground Crossfall	-1.6%
Existing Ground Crossfall – Ideal Crossfall	-0.4%
Slope Tolerance	Existing Ground Slope minus Ideal Crossfall is -0.4%, which is less than the 0.5% Slope Tolerance
Corrected Crossfall	The Corrected Cross slope will be -1.6%

Output	Value
Corrected Crossfall	-1.6%

Case 1-4: Ideal Crossfall is less than Existing Ground Crossfall

Inputs:

Inputs
Ideal Crossfall	-2.0%
Minimum Level Depth	0
Slope Tolerance	0.50%
Overlay Slope Options	User Defined with Flapping
Use Profile Options	Minimum Level Depth
Inside Edge of Lane Offset	true (values vary)
Outside Edge of Lane Offset	true (values vary)

Calculations:

Input	Value
Existing Ground Crossfall	-1.0%
Existing Ground Crossfall – Ideal Crossfall	-1.0%
Slope Tolerance	Existing Ground Slope minus Ideal Cross slope is -1.0%, which is greater than the 0.5% Slope Tolerance
Corrected Crossfall	The Corrected Cross slope will be -1.5%

Output	Value
Corrected Crossfall	-1.5%

Case 2-1: Ideal Crossfall is greater than High Point

Inputs:

Inputs
Ideal Crossfall	-2.0%
Minimum Level Depth	0
Slope Tolerance	0.50%
Overlay Slope Options	User Defined with Flapping
Use Profile Options	Minimum Level Depth
Inside Edge of Lane Offset	true (values vary)
Outside Edge of Lane Offset	true (values vary)

Calculations:

Input	Value
Existing Ground Crossfall	-3.0%
Existing Ground Crossfall – Ideal Crossfall	1.0%
High Point Crossfall, measured from Inside Edge of Lane to High Point	-2.6%
High Point Crossfall – Ideal Crossfall	-0.6%
Slope Tolerance	The Slope Difference between the Existing Ground Cross slope minus Ideal Cross slope result is 1.0%, which is less than the Slope Tolerance of 0.50%
Corrected Crossfall	The Corrected Cross slope will be -2.5%

Output	Value
Corrected Crossfall	-2.5%

Case 2-2: Ideal Crossfall is greater than High Point

Inputs:

Inputs
Ideal Crossfall	-2.0%
Minimum Level Depth	0
Slope Tolerance	0.50%
Overlay Slope Options	User Defined with Flapping
Use Profile Options	Minimum Level Depth
Inside Edge of Lane Offset	true (values vary)
Outside Edge of Lane Offset	true (values vary)

Calculations:

Input	Value
Existing Ground Crossfall	-3.0%
Existing Ground Crossfall – Ideal Crossfall	1.0%
High Point Crossfall, measured from Inside Edge of Lane to High Point	-2.4%
High Point Crossfall – Ideal Crossfall	-0.4%
Slope Tolerance	Existing Ground Cross slope minus Ideal Cross slope is 1.0%, which is greater than the 0.5% Slope Tolerance
Corrected Crossfall	The Corrected Cross slope will be -2.5%

Output	Value
Corrected Crossfall	-2.5%

Case 2-3: Ideal Crossfall is less than High Point

Inputs:

Inputs
Ideal Crossfall	-2.0%
Minimum Level Depth	0
Slope Tolerance	0.50%
Overlay Slope Options	User Defined with Flapping
Use Profile Options	Minimum Level Depth
Inside Edge of Lane Offset	true (values vary)
Outside Edge of Lane Offset	true (values vary)

Calculations:

Input	Value
Existing Ground Crossfall	-1.6%
Existing Ground Crossfall – Ideal Crossfall	0.4%
High Point Crossfall, measured from Inside Edge of Lane to High Point	-1.2%
High Point Crossfall – Ideal Crossfall	-0.8%
Slope Tolerance	Existing Ground Crossfall minus Ideal Crossfall is 0.4%, which is less than the 0.5% Slope Tolerance.
Corrected Crossfall	The Corrected Cross slope will be -1.6%

Output	Value
Corrected Crossfall	-1.6%

Case 2-4: Ideal Crossfall is less than High Point

Inputs:

Inputs
Ideal Crossfall	-2.0%
Minimum Level Depth	0
Slope Tolerance	0.50%
Overlay Slope Options	User Defined with Flapping
Use Profile Options	Minimum Level Depth
Inside Edge of Lane Offset	true (values vary)
Outside Edge of Lane Offset	true (values vary)

Calculations:

Input	Value
Existing Ground Crossfall	-1.0%
Existing Ground Crossfall – Ideal Crossfall	1.0%
High Point Crossfall, measured from Inside Edge of Lane to High Point	-0.8%
High Point Crossfall – Ideal Crossfall	-1.2%
Slope Tolerance	Existing Ground Crossfall minus Ideal Crossfall is 1.0%, which is greater than the 0.5% Slope Tolerance.
Corrected Crossfall	-1.5%

Output	Value
Corrected Crossfall	-1.5%

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, P2	EOV	Overlay edges on finish surface
P3, P4	EOV_Overlay	Edges of bottom of overlay
P5, P6	EOV_Levelling	Edges of bottom of level
L1	Top, Pave	Top of overlay
L2, L3, L4	Overlay	Overlay links
L5, L6	Level	For the levelling case
S1	Overlay	Area between the top and bottom of overlay
S2	Level	Area between the top and bottom of level
L7	Existing Ground	Crossfall of the existing ground

Coding Diagram