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Designing a Widening Only Template

Updated October 31, 2019

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This example explains how to do just widening for a template.

Download the sample file used with this example: HERE.

This example uses a specific E-library template component, Widening V - Widening Only-left, located in the Overlay and Widenings folder. The operation and behavior of this component are explained.

Creating Reference Features 

• Open the Location module. Open Widening Only.DSNX (included with this example).
• Choose menu Setup | Location Setup | Alignment | Features. Make sure the below feature is set as Reference Features as shown in Figure 1:

• RF 1 -> CL-0 

Figure 1: Setting up centerline as a reference feature.

• For the reference feature, make sure the Section tab setting is set to Intersection and that an appropriate symbol is chosen to display the reference feature (see Figure 2).

Figure 2: Setting up Cross Section Display of Reference Feature

 

Applying the Mill/fill and Overlay Template

• Choose menu Home| Templates. There are three downloaded folders include Slopes Components, Overlays and Widenings and Ditches and Subcuts in the templates dialog box.

Figure 3: Template Editor dialog box

 

If your project is just widening a road, follow the below steps.

• In the downloaded folder (Overlays and Widenings). Click on the plus button and then right-click on the Widening V - Widening Only-left component and select Copy.
• Right-click on the DF-Widening Only and paste the copied component as A New.
• Right-click, while the Widening V-Widening Only object is selected and choose menu Properties. Set the following parameters:

Variable	Default Value	Description
PavementDepth	0.07	Depth of pavement. At different stations, pavement depth can be modified by click on the Overrides button.
OverlayThick	0.05	Pavement overlay thickness. At different stations, overlay thickness can be modified by click on the Overrides button.
DesignLaneWidth	Reference Feature 1 (CL-0)	The lane width can be changed in different stations. RoadEng interpolates lane width between the stations automatically.
ShldrOffset	Reference Feature 1 (CL-0)	Offset from C/L to outside edge of design shoulder.
CrossSlopeLane	0.0	Lane (inside) cross slope.  Crown slope will be added to this value.
CrossSlopeShldr	0.0	Shoulder (outside) cross slope.
CrossSlopeBase	-2.0	Cross slope of the bottom of the base layer.
CrossSlopeSubbase	0.0	Type 0.0 for default. But at different stations, the sub-base slope can be defined by click on the Overrides button.
MillWidthLane	Reference Feature 1 (CL-0)	Width of inside milling.
MillDepthLane	0.0	Depth of inside milling. At different stations, mill depth(for lane) can be modified by click on the Overrides button.
MillDepthShldr	0.0	Depth of outside milling. At different stations, mill depth(for shoulder) can be modified by click on the Overrides button.
OutsideFillSlope	20.0	Fill slope of exposed base and sub-base material.
BaseThick	0.2	Thickness of base layer (maybe zero if desired). At different stations, base thick can be modified by click on the Overrides button.
BaseOffset	Reference Feature 1 (CL-0)	Offset from C/L to edge of base.
SubBaseThick	0.2	Thickness of sub-base layer.

• In the Ditches and Subcuts folder, click on the plus button and then right-click on the Ditch III - Vertical Tie-left component and select Copy.
• Right-click on the DF-Widening Only and paste the copied component as A New.
• Right-click, while the Ditch III - Vertical Tie-left object is selected and choose menu Properties. Set the following parameters:

Variable	Default    Value	Description
DitchInSlp	20.0	Ditch inside slope.
DitchDepth	Use default feature -2.2	Depth of the ditch measured from either centerline.
DitchBotWd	5.0	Width of the bottom of the ditch horizontal distance.
DitchBotSlp	-4.0	Bottom of the ditch slope.
bExcludeDitch	0.0	Set to 1 to exclude ditch. This parameter can be overridden.
bUseOutside	1.0	DitchDepth reference. 0=inside, 1=outside
bCutOnly	0.0	If true, ditch will be formed only when the bottom outside is in cut.

• While the Slope I -Standard Cut/Fill-left component is selected click on the Shift-Down button to arrange components in the template with this order: 

1-Widening V - Widening Only-left

2-Ditch III - Vertical Tie-left

3 -Slope I -Standard Cut/Fill-left

• Right-click, while the Slope I -Standard Cut/Fill-left object is selected and choose menu Properties. Set the following parameters:

 

Variable	Default           Value	Description
FinalCutSlp	25.0	Final cut slope.
FinalFillSlp	100.0	Final fill slope.
bApplyInCut	1.0	If set to 1 the component will be applied when the attachment point is below stripped ground.
bApplyInFill	1.0	If set to 1 the component will be applied when the attachment point is above stripped ground.

• Press OK twice. When prompted, Recalculate Range.
• The screen should appear as shown below.

Figure 4 – Modified template

This completes the example.