OverlayMillLevel1Lane1Side

Attachment

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

Input Parameters

Note: All dimensions are in meters or feet unless otherwise noted. All slopes are in run-over-rise form unless indicated as a percent slope with a "%" sign.

Parameter	Description	Type	Default
Side	Specifies which side of the road centreline to place the rehab subassembly	User defined	Left
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
Outside Edge of Existing lane	This is the start point for calculating existing ground slope	Numeric	0.000m
Overlay Depth	Depth of the overlay layer	Numeric, positive	0.300m
Overlay Slope Options	Specifies overlay slope options. Tip: Flapping is a term used to describe how the Corrected Crossfall 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 crossfall and ideal crossfall. 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 'without 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 Crossfall will be calculated, relative to the slope tolerance for the subassembly Flapping Within Tolerance: Corrected Crossfall will be set equal to Ideal Crossfall Flapping Without Tolerance: Corrected Crossfall will be adjusted to match Existing Ground Slope within Slope Tolerance User Defined Without Flapping Flapping will not be used to specify how the Corrected Crossfall will be calculated, relative to Slope Tolerance for the subassembly Slope Difference Within Tolerance: Corrected Crossfall will be adjusted to match Existing Ground Slope, within Slope Tolerance Slope Difference Without Tolerance: Corrected Crossfall will be adjusted to match the Ideal Crossfall, within slope tolerance Outside/Inside Lane Superelevation Outside or Inside Lane Superelevation will replace Ideal Crossfall. Corrected Crossfall values for the overlay layer will be defined by the superelevation table for the section instead of the Ideal Crossfall. 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. Match Slope The Corrected Crossfall is always set equal to Existing Ground Slope Use Ideal Crossfall The Corrected Crossfall Slope is always set equal to Ideal Crossfall	User defined	User Defined without Flapping
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	12.000m
Use Profile Options	Select to tie the inside edge of overlay to a profile, adjust level to minimum level depth lock to preceding 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	Minimum elevation depth between the existing surface and the bottom of the overlay layer.	Numeric	0.600m
Minimum Mill Depth	The minimum mill depth below the existing surface.	Numeric	0.300m
Slope Tolerance	Tolerance for varying the overlay slope.	Numeric	0.50%

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, negative	-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, negative	n/a

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

Areas must be provided for all layers.
The Levelling area is equal to the areas of Level 1 + Mill layers combined.
The Milling Area layer is represented in the diagram below as Mill.
Minimum Level Depth is equal to the area from the top of the milling layer to the bottom of the overlay layer.

Special Case

When Use Profile is selected in Profile Options, the overlay is located below the existing ground.

Behaviours:

Milling will continue Minimum Mill Depth downwards from bottom of Overlay
The area of Minimum Mill Depth will be filled as Level area.
Total Mill area is from the Datum layer to the Existing Ground layer.

Note: The same results will likely occur when Lock to Preceding is selected in Use Profile Options.

Point, Link and Shape Codes

Point, Link or Shape	Code	Description
P1, P2	EOV	Overlay edges on finished gradient (edges of top of overlay)
P3, P4	EOV_Overlay	Overlay edges beneath levelling layer (edges of bottom of overlay)
P7, P8	EOV_Milling	Overlay edges beneath milling layer (edges of bottom of mill)
L1	Top, Pave	Top of overlay
L2, L3, L4	Overlay	Overlay links
L5, L6	Level	For the levelling case
L7, L8	Mill	For the milling case
L9	Level, Mill, Datum	Links for the milling layer
S1	Overlay	Area between the top and bottom of overlay. This area overlaps the levelling area as shown in the coding diagram below
S2	Level	Area above existing surface and below the bottom of overlay (levelling case)
S3	Mill	Area between bottom of existing surface and bottom of mill (milling case)

Note: Multiple Links will occur when the Existing Ground surface is not smooth. This is shown in the image below by L10.