OverlayLevelCrown

Attachment

The attachment point is the crown point of the overlay layer with finished ground cross slope.

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 (meters or feet)
Crown Offset	Positive or negative offset at the crown point	Numeric	0.000m (0.00 ft)
Crown Use Profile Options	Select to tie the inside edge of overlay to a profile, or adjust crown point elevation to minimum level depth	User Defined	Minimum Level Depth
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 Left Lane	This is the start point for calculating existing ground slope for the left lane	Numeric	0.000m (0.00 ft)
Inside Edge of Existing Right Lane	This is the start point for calculating existing ground slope for the right lane	Numeric	0.000m (0.00 ft)
Outside Edge of Existing Left Lane	This is the end point for calculating existing ground slope for the left lane	Numeric	-12.000m (-12.000 ft)
Outside Edge of Existing Right Lane	This is the end point for calculating existing ground slope for the right lane	Numeric	12.000m (12.000 ft)
Overlay Depth	Depth of the overlay layer	Numeric, positive	0.300m (0.300 ft)
Right and Left Overlay Slope Options	Specifies right and left 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 Cross Slope. 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 does not have a superelevation table defined, Ideal Cross Slope 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 behavior 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 behavior 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 Cross Slope The corrected cross slope is always set equal to Ideal Cross Slope.	User Defined	User Defined Without Flapping
Left Ideal Cross Slope	Specifies user defined Ideal Cross Slope for the finished ground profile of the left lane	Numeric	-2.00%
Left Minimum Level Depth	The minimum level depth between the existing surface and the bottom of the left overlay layer	Numeric, positive	0.300m (0.300 ft)
Left Slope Tolerance	Tolerance for varying the left overlay slope	Numeric, positive	0.50%
Right Ideal Cross Slope	Specifies user defined Ideal Cross Slope for the finished ground profile of the right lane	Numeric	-2.00%
Right Minimum Level Depth	The minimum level depth between the existing surface and the bottom of the right overlay layer	Numeric	0.300m (0.300 ft)
Right Slope Tolerance	Tolerance for varying the right overlay slope	Numeric, positive	0.50%
Left Lane Width	The left lane width, determined by the offset of the outside edge of the left lane from the inside edge of left lane	Numeric, negative	-12.000m (-12.000 ft)
Right Lane Width	The right lane width, determined by the offset of the outside edge of the right lane from the inside edge of right lane	Numeric, positive	12.000m (12.000 ft)

Additional Input Parameter reference

Flapping Within Tolerance:

Note: Because the slope difference between the existing ground cross slope and the ideal cross slope is within slope tolerance, the two sides of the road will output different corrected cross slopes relative to the existing ground (EG) surface cross slope for each side of the road. Each side of the road will have corrected cross slope set as close to the existing ground cross slope as possible.

Minimum Level Depth

Note: The minimum level depth represents the minimum depth of the leveling layer, measured between the existing ground high point and the bottom of the overlay layer.

Crown Offset

Note: The distance that the crown point for the subassembly is offset from the road centerline.

Output Parameters

Parameter	Description	Type
Left Corrected Cross Slope	The left corrected cross slope represents the adjusted cross slope for the left side of the road profile, which has been optimized to match, as closely as possible, the rehab subassembly parameters you specified.	Percentage
Right Corrected Cross Slope	This is the adjusted cross slope for the right side of the road, which has been optimized to match, as closely as possible, the rehab subassembly parameters you specified.	Percentage
Left Existing Ground Slope	The cross slope (%) of the existing ground profile for the left lane, calculated from the inside edge of the left lane to the outside edge of the left lane.	Percentage
Right Existing Ground Slope	The cross slope (%) of the existing ground profile for the right side of the road, calculated from the inside edge of the right lane to the outside edge of the right lane.	Percentage

Target Parameters

Parameter	Description	Required?
Target Surface	The object defining the surface of the existing roadway	Yes
Crown Offset Target	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
Left Lane Width Target	The object defining the offset of the outside edge of left lane from the inside edge of the left lane. The following object types can be used as targets for specifying this offset: alignments, polylines, feature lines, or survey figures.	No
Right Lane Width Target	The object defining the offset of the outside edge of the right lane from the inside edge of the right lane. The following object types can be used as targets for specifying this offset: alignments, polylines, feature lines, or survey figures.	No
Left Inside Edge of Existing Lane Offset Target	The object defining the left 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
Left Outside Edge of Existing Lane Offset Target	The object defining the left 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
Right Inside Edge of Existing Lane Offset Target	The object defining the right 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
Right Outside Edge of Existing Lane Offset Target	The object defining the right 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

Behavior

This subassembly assumes that no milling layer is added to the subassembly.

Inputs:

Inputs	Value
Ideal Cross Slope, Left	-2.0%
Ideal Cross Slope, Right	-2.0%
Crown Offset	0.000' (0.00m)
Left Lane Width	12' (3.6m)
Right Lane Width	12' (3.6m)
Minimum Level Depth	0.000' (0.00m)
Slope Tolerance	0.50%
Overlay Slope Options	User Defined With Flapping
Use Profile Options	Minimum Level Depth

Calculations:

Left Side Input	Value
Existing Ground Cross Slope	-2.2%
Existing Ground Cross Slope - Ideal Cross Slope	0.2%
High Point Cross Slope, measured from Crown Point to High Point	-1.2%
High Point Cross Slope - Ideal Cross Slope	0.8%
Slope Tolerance	The Slope Difference between the Existing Ground Cross Slope minus Ideal Cross Slope result is 0.2%, which is less than the Slope Tolerance of 0.50%
Corrected Cross Slope	The Corrected Cross Slope will be adjusted to -2.2

Right Side Input	Value
Existing Ground Cross Slope	-2.2%
Existing Ground Cross Slope - Ideal Cross Slope	-0.2%
Tolerance	Existing Ground Slope minus Ideal Cross Slope is -0.2%, which is less than the Slope Tolerance of 0.5%
Corrected Cross Slope	The Corrected Cross Slope will be adjusted to -2.2%

Final Input	Value
Corrected Cross Slope, Left	-2.2%
Corrected Cross Slope, Right	-2.2%
Adjust elevation	The elevation will be adjusted because of the high point elevation on the left side.

Output

Output	Value
Corrected Cross Slope, Left	-2.2%
Corrected Cross Slope, Right	-2.2%

Point, Link, and Shape Codes
Point, Link, or Shape	Code	Description
P1	Crown	Crown point for top of overlay
P2, P3	EOV	Overlay edges on finished grade for left and right side of the road
P4	Crown_Overlay	Crown point for bottom of overlay
P5, P6	EOV_Overlay	Edges of bottom of overlay for left and right side of the road
P7, P8	EOV_Leveling	Edges of bottom of level for left and right side of the road
L1, L2	Top, Pave	Top of overlay for left and right side of the road
L3, L4, L5, L6	Overlay	Overlay links (height and width) for left and right side of road
L7, L8	Level	Level links (height) for left and right side of the road
S1	Overlay	Area between the top and bottom of overlay
S2	Level	Area between the top and bottom of level