LnRehab
Last updated: 2021-02-12
Description
Subassembly is used for designing the lane portion of rehabilitation sections. Models both sides of the roadway at once. To be used in conjuction with Shoulder, Curb and Gutter or Barrier subassemblies, in addition to the ShoulderRehabiliation subassembly for special overlay or shoulder widening from the Target Surface.
Behavior
Subassembly models various rehabilitation options used by the Wisconsin Department of Transportation.
Starting at the attachment point, links defining a finished pavement surface are inserted using a slope on each side as specified by the Superelevation Type input parameter. User is allowed to specify the use of the Outside or Inside Lane Superelevation Slope as obtained from the superelevation specifications for the baseline alignment. The input of the Apply Overlay parameter defines whether the attachment point elevation (No) or the target surface elevation (Yes) is used to establish the starting elevation. When the target surface elevation is used, the Pavement Depth parameter is the minimum depth above the Target Surface within the offsets defined by Lane Width Left and Lane Width Right. Keep in mind that this is not necessarily the distance above the target surface at the horizontal location of the attachment point. When the attachment point elevation is used to establish the starting elevation, the Pavement Depth parameter is the depth of pavement, measured down from the attachment point. In both cases, links project down from the outside edges of pavement to intersect with Target Surface to create a closed shape. Links are inserted from this projection point inward to the horizontal location of the attachment point, following the target surface, so a close shape is formed.
In the cutout portions, various base course layer depths can be.If the Base Depth entered is greater than the Subbase Depth entered, then Subbase Depth is equal to the Base Depth. If the Depth to Subgrade input is less than either the Base Depth or the Subbase Depth, then the Depth to Subgrade will be equal to the greater of the two values. From the outside edge of the subgrade surface, a vertical link is inserted upward to the intersection with the target surface.
The subgrade slope is controlled by the Subgrade SE Method parameter. If Subgrade SE Method is set to Use Outside Lane SE or Inside Lane SE, the slope of the subgrade is equal to insertion side Outside or Inside Lane Superelevation Slope for the defined baseline alignment. If Subgrade SE Method is set to Follow Slope of Pavement Layer, then the subgrade slope will always be equal to the slope of the pavement surface. User also has the option of specifying a Fixed Slope. When the slope of the subgrade differs from the slope of the pavement surface, all other base course layers will follow the slope of the subgrade surface. Base course links and the subgrade surface link all extend to a distance defined by Lane Width Right and Lane Width Left.
The input parameter descriptions describe some of the behavior of the subassembly, and beyond that, diagrams and example Input parameters are used to best describe the behavior of the subassembly.
Example 1: Overlay Sections with no Cutout
Pertinent Parameters set to accomplish the example shown include:
Lane Width Left = 12.0
Lane Width Right = 12.0
Apply Overlay = Yes
Pavement Depth = 6.0
Base Depth, Subbase Depth and Depth to Subgrade all equal 0.0
Superelevation Type = Use Outside Lane SE
The inputs for parameters Subgrade SE Method, Cutout Width Left, and Cutout Width Right are ignored because the base course depths were set equal to 0.The Pavement Depth parameter is used to establish the minimum cover over the Target Surface between the offsets defined by Lane Width Left and Lane Width Right.
Example 2: An overlay section with Shoulder Cutout Parameters
Pertinent Parameters set to accomplish the example shown include:
Lane Width Left = 12.0
Lane Width Right = 12.0
Apply Overlay = Yes
Pavement Depth = 6.0
Base Depth = 1.0
Subbase Depth = 1.5
Depth to Subgrade = 2.0
Superelevation Type = Use Outside Lane SE
Subgrade SE Method = Use Outside Lane SE
Cutout Width Left = 10.0
Cutout Width Right = 10.0
Because Apply Overlay is set to Yes, the Pavement Depth parameter is used to establish the minimum cover over the Target Surface between the offsets defined by Lane Width Left and Lane Width Right. The Cutout is modeled because base course layers have values greater then 0.0 ft.
Example 3: A section with no overlay and Shoulder Cutout
Pertinent Parameters set to accomplish the example shown include:
Lane Width Left = 12.0
Lane Width Right = 12.0
Apply Overlay = No
Pavement Depth = 6.0
Base Depth = 1.0 ft.
Subbase Depth = 1.5 ft.
Depth to Subgrade = 2.0 ft
Superelevation Type = Use Outside Lane SE
Subgrade SE Method = Use Outside Lane SE
Cutout Width Left = 10.0 ft
Cutout Width Right = 10.0 ft
In this example, the Apply Overlay parameter is set to No, so Pavement Depth is measured down from the baseline profile.Once again the cutout is modeled because base course layers have depth values greater then 0.0 ft.
In this scenario, if any part of the the pavement shape falls below the Target Surface, a message is sent to the Events window.
Attachment & layout mode operation
The attachment is at the crown point of the subassembly.
In layout mode, this subassembly displays the pavement layer links using widths defined by Lane Width Right and Lane Width Left at a slope of -2%.
Input parameters
Info: All dimensions are in 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 |
|---|---|---|---|
| Lane Width Left | Width of the lane left of the attachment point. | Numeric | 12.0 |
| Lane Width Right | Width of the lane right of the attachment point. | Numeric | 12.0 |
| Apply Overlay | Parameter that defines whether the attachment point elevation(No) or the target surface elevation(Yes) is used to establish the starting elevation. | Yes / No | Yes |
| Pavement Depth (inches) | If Apply Overlay is Yes, this parameter sets the minimum depth above the Target Surface within the offsets defined by Lane Width Left and Lane Width Right. If Apply Overlay is No, this parameter is the depth of pavement, measured down from the attachment point. | Numeric | 6.0 |
| Base Depth | Depth to the bottom of the first base course layer; zero if the distance to the bottom of the first base course layer is equal to the Depth to Subgrade. Measured from top of the pavement. | Numeric, Positive | 0.0 |
| Subbase Depth | Depth to the bottom of the Subbase layer; zero if the distance to the bottom of the subbase layer is equal to the Depth to Subgrade. Measured from the top of the pavement. | Numeric, Positive | 0.0 |
| Depth to Subgrade | Distance from the top of the pavement surface to the subgrade surface. | Numeric, Positive | 2.0 |
| Superelevation Type | Specifies whether the superelevation slope defined for the baseline alignment should be used, if it exists. Entry of Fixed, or if there is no baseline outside/inside lane superelevation values at this location, results in the Fixed Slope for Top of Pavement parameter to be used; Entry of Use Outside Lane SE results in the pavement slope being equal to insertion side Outside Lane Superelevation Slope for the defined baseline alignment; Entry of Use Inside Lane SE results in the pavement slope being equal to insertion side Inside Lane Superelevation Slope for the defined baseline alignment. |
String, Combo List of options: a.) Fixed, b.) Use Outside Lane SE, c.) Use Inside Lane SE |
Use Outside Lane SE |
| Fixed Slope for Top of Pavement - Left | Fixed Slope of the pavement surface on the left side of the attachment point, used when the superelevation slope of the baseline alignment is not defined or when Superelevation Type equals Fixed. | Slope | -2% |
| Fixed Slope for Top of Pavement - Right | Fixed Slope of the pavement surface on the right side of the attachment point, used when the superelevation slope of the baseline alignment is not defined or when Superelevation Type equals Fixed. | Slope | -2% |
| Subgrade SE Method | Specifies to the method used to determine the slope of the subgrade surface. |
String, Combo List of options: a.) Use Outside Lane SE, b.) Use Inside Lane SE, c.) Fixed Slope, d.) Follow Slope of Top of Pavement |
Use Outside Lane SE |
| Subgrade Slope -Left | Default cross slope of the subgrade surface left of the attachment point. This value is used if Fixed Slope is selected as the Subgrade SE Method or superelevation is not specified for the baseline alignment. | Slope | -2% |
| Subgrade Slope -Right | Default cross slope of the subgrade surface right of the attachment point. This value is used if Fixed Slope is selected as the Subgrade SE Method or superelevation is not specified for the baseline alignment. | Slope | -2% |
| Cutout Width Left | Offset left of the attachment point where the cutout begins. If all base course depths and Depth to Subgrade are set to 0.0, no cutout will be modeled and this parameter is ignored. | Numeric | 10.0 |
| Cutout Width Right | Offset right of the attachment point where the cutout begins. If all base course depths and Depth to Subgrade are set to 0.0, no cutout will be modeled and this parameter is ignored. | Numeric | 10.0 |
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.
| Parameter | Description | Status |
|---|---|---|
| Target Surface | Name of Surface used for Overlay Measurement and Cutout Daylighting. The following object types can be used as targets for specifying the surface: surfaces. | Required |
| Lane Width Left | Object used to define the leftmost outside edge of lane. The following object types can be used as targets for specifying the width: alignments, polylines, feature lines, or survey features. | Optional |
| Lane Width Right | Object used to define the rightmost outside edge of lane. The following object types can be used as targets for specifying the width: alignments, polylines, feature lines, or survey features. | Optional |
| Cutout Width Left | Object used to define the leftmost location where cutout begins. The following object types can be used as targets for specifying the width: alignments, polylines, feature lines, or survey features. | Optional |
| Cutout Width Right | Object used to define the leftmost location where cutout begins. The following object types can be used as targets for specifying the width: alignments, polylines, feature lines, or survey features. | Optional |
Output parameters
| Parameter | Description | Type |
|---|---|---|
| Left Pavement Slope | Slope of the Pavement for Left Side Lane. | Slope |
| Right Pavement Slope | Slope of the Pavement for Right Side Lane | Slope |
| Left Subgrade Slope | Slope of the Subgrade Surface for Left Side Lane. | Slope |
| Right Subgrade Slope | Slope of the Subgrade Surface for Right Side Lane. | Slope |
| Base Depth Left | Base1 Depth at outer Edge on left side computed by taking the difference between the elevation at ETW_Left and ETW_Base1_Left | Numeric |
| Base Depth Right | Base1 Depth at outer Edge on right side computed by taking the difference between the elevation at ETW_Right and ETW_Base1_Right | Numeric |
| Subbase Depth Left | Base2 Depth at outer Edge on left side computed by taking the difference between the elevation at ETW_Left and ETW_Base2_Left | Numeric |
| Subbase Depth Right | Base2 Depth at outer Edge on right side computed by taking the difference between the elevation at ETW_Right and ETW_Base2_Right | Numeric |
| Depth to Subgrade Left | Depth to Subgrade at outer Edge on left side computed by taking the difference between the elevation at ETW_Left and ETW_Sub_Left | Numeric |
| Depth to Subgrade Right | Depth to Subgrade Surface at outer Edge on right side computed by taking the difference between the elevation at ETW_Right and ETW_Sub_Right | Numeric |
| Offset of ETW_Sub_Left | Offset of the leftmost outer edge of the subgrade surface. | Numeric |
| Elevation of ETW_Sub_Left | Elevation of the leftmost outer edge of the subgrade surface. | Numeric |
| Offset of ETW_Sub_Right | Offset of the rightmost outer edge of the subgrade surface. | Numeric |
| Elevation of ETW_Sub_Right | Elevation of the rightmost outer edge of the subgrade surface. | Numeric |
| Offset of ETW_Left | Offset of the edge of the top of pavement, left side | Numeric |
| Offset of ETW_Right | Offset of the edge of the top of pavement, right side | Numeric |
Coding diagram
Point Codes
Link Codes
Shape Codes
Additional Point, Link and Shape Codes for Example 3 as shown in Behavior Section
For those codes not shown in diagram below, use codes shown in previous diagrams
Point, Link, and Shape codes
| Point/Link/Shape | Codes | Description |
|---|---|---|
| P1 |
CL Crown |
Centerline of Roadway; also Crown Point |
| P2 | Crown_Pave1 | |
| P3 | ETW_Left | Edge of the top of pavement, left side |
| P4 | ETW_Right | Edge of the top of pavement, right side |
| P7 | ETW_Base1_Left | |
| P8 | ETW_Base2_Left | |
| P9 | ETW_Sub_Left | |
| P10 | Cutout_Left | Top inside edge of cutout on the left side |
| P11 | Cutout_Base1_Left | |
| P12 | Cutout_Base2_Left | |
| P13 | Cutout_Sub_Left | |
| P14 | ETW_Base1_Right | |
| P15 | ETW_Base2_Right | |
| P16 | ETW_Sub_Right | |
| P17 | Cutout_Right | Top inside edge of cutout on the right side |
| P18 | Cutout_Base1_Right | |
| P19 | Cutout_Base2_Right | |
| P20 | Cutout_Sub_Right | |
| P23 | Crown_Base1 | |
| L1 |
Top Pave |
|
| L2 | Datum |
Runs from Point P2 to P10 on Left Runs from Point P2 to P17 on Right |
| L3 | No Code | |
| L4 |
Datum Cutout Subbase SUBG |
Subgrade Surface |
| L5 | Base1 | |
| L6 | Base2 | |
| L7 |
Datum Cutout Subbase SUBG |
|
| L9 | Pave1 | |
| S1 | Pave1 | |
| S2 | Base1 | |
| S3 | Base2 | |
| S4 | Subbase | |
| S5 | Pave2 | Pavement material beneath overlay surface. |