Introduction:

For further details on the wedge only template, please click on the following web reference link; Wedge Only Template.

Objective:

1. Compute wedging quantities for a two-lane roadway using the outside eop graphics and setting a proposed uniform lane width (eot) with parametric constraints. -Y15- is the dual lane roadway.

2. Compute wedging quantities for a multi-lane divided roadway using plan graphics for the inside and outside eot and eop. -Y8- is the divided multi-lane roadway.

Dataset:

• jobrdy.gpk
• r2011_rdy.ird
• r2012_ex_surface.dtm
• r2012_rdy.itl
• r2012_rdy.rdp
• r2012_Rdy_dsn.dgn
• r2012_Rdy_eop.dgn
• r2012_Rdy_XSC_Y8W.dgn
• r2012_Rdy_XSC_Y15W.dgn
• Y8_PvmtS95x.inp
• Y8_WedgeB250x.inp
• Y8_WedgeI190x.inp
• Y8_WedgeS95x.inp
• Y15_PvmtS95x.inp
• Y15_WedgeB250x.inp
• Y15_WedgeI190x.inp
• Y15_WedgeS95x.inp
• rddbs\cmjobRDY.alg
• rddbs\cmjobRDY.xml
• rddbs\planGraphics.txt

Exercise 1: Wedging for a Two-Lane Roadway

Name: Y15_Wedge Type: Alignment Horizontal Alignment: Y15 Vertical Alignment: Y15 Action: Add then Close

Corridor: Y15_Wedge Station: 10+00 Interval : 10 Template: Wedge Only TMP-1 Action: Add then Close

Step 8.
Move the seek outside existing eop graphics points to the centerline location. Enter the following settings for the Parametric Constraints dialog box.

NOTE: Initially the seek outside existing eop graphics points are drawn at a 5' offset from the centerline. These two points need to be moved to the centerline location to insure all oeop graphics are targeted by these points. Remember that these points are programmed to seek the targets to the outside of its current position.

C. Label: WG_OEEOP Seek Offset Start value: 0 Stop Value: 0 Start Station: 10+00 Stop Station: 27+29.56 Action: Add

Step 9.
Move the seek outside proposed eot graphics points to the proposed eot location. Enter the following settings for the Parametric Constraints dialog box.

NOTE: Initially the seek proposed eot graphics points are drawn at a 10' offset from the centerline. If plan view graphics were used to locate the eot limits, then these two points need to be moved to the centerline location to insure all eot graphics are targeted by these points. Remember that these points are programmed to seek the targets to the outside of its current position. For this exercise, a proposed uniform 12' wide lane is used on each side of the centerline. Use parametric constraints to move these points to the 12' horizontal mark on both sides.

C. Label: WG_OEOT Seek Offset Start value: 12 Stop Value: 12 Start Station: 10+00 Stop Station: 27+29.56 Action: Add then Close

Step 10.
To help us visualize the horizontal location of these eop graphic points, use Display Reference. Add the two oeeop alignments (with Display as Right of Way checked on) to the Display References list.

NOTE: Wedging is dependent on the horizontal location of the eot and eop points.

Parametric constraints can be used to set the depth for each layer. If superelevation is used for the roadway, import the ASCII text file, match the existing cross slope with Cross Slope Optimization, or run the Superelevation Wizard in Roadway Designer. Since Y15 has a flat curve, the whole project is at normal crown.

Step 11.
Process All.

Step 12.
Create the proposed Y15_Wedge corridor DTM. Check the in the following settings in the Create Surface dialog box. Apply and Close out of the Create Surface dialog box.

New Surface for Each Corridor: (checked) Empty Design Surface: (checked) Add Transverse Features: (unchecked) Add Exterior Boundary: (unchecked) Features: (unchecked) Components: (unchecked) Action: Apply then Close

Step 13.
Save the r2012_rdy.ird.

Step 14.
Close out of Roadway Designer.

Step 15.
Activate the Geopak Draw Cross Sections from Surfaces dialog box.

Step 18.
Enter the following settings in the XS Cells tab.

Job Number: RDY Chain: Y15 Pattern: By Station Begin Station: 10+00 End Station: 27+29.56 Even: 10 Left Offset: 75 Right Offset: 75 Action: Surfaces Tab

Step 19.
Add the following DTM files in the Surfaces tab. Remember the only DTM file that needs the symbology defined is the existing ground DTM (r2012_ex_surface.dtm).

• Y15_Wedge.dtm
• r2012_ex_surface.dtm

Step 20.
Draw cross sections.

Step 21.
Process the following preset input files to generate Geopak quantities reports of the pavement layers.

• Y15_PvmtS95x.inp
• Y15_WedgeS95x.inp
• Y15_WedgeI190x.inp
• Y15_WedgeB250x.inp

Step 22.
Close out of the DGN file.

Exercise 2: Wedging for a Multi-Lane Roadway

Name: Y8_Wedge Type: Alignment Horizontal Alignment: Y8 Vertical Alignment: Y8 Action: Add then Close

Corridor: Y8_Wedge Station: 11+00 Interval : 50 Template: Wedge Only TMP-1 Action: Add then Close NOTE: The same wedge only template can be used for an undivided and divided facility. Because Y8 is a long run, an interval of 50' instead of 10' was preferred.

Step 8.
Move all of the seek outside eop and eot points to the centerline location. Add the following 2Constraint Labels to the Parametric Constraints dialog box list. Set the values to zero.

• WG_EEEOP Seek Offset
• WG_OEOT Seek Offset

NOTE: Graphics are used to located the horizontal location of both inside and outside eot and eop alignments. These points need to be moved to the centerline location to insure all eop and eot graphics are targeted by these points. Remember that these points are programmed to seek the targets to the outside of its current position.

Step 9.
Use "Cross Slope Optimization" to match the existing cross slope for each side of the median. Enter the following settings for the Cross Slope Optimization dialog box.

NOTE: The existing cross slope is a roof-top crown section which has a crown point at the center on each side of the road. With Cross Slope Optimization, the crown point is proposed to be at the inside edge of pavement. The outside eop point is superelevated from the crown point with one continuous slope.

Step 10.
To help us visualize the horizontal location of these eop and eot graphic points, use Display Reference. Add the 8 alignments (with Display as Right of Way checked on) to the Display References list.

NOTE: Wedging is dependent on the horizontal location of the eot and eop points.

Parametric constraints can be used to set the depth for each layer.

Step 11.
Process All.

Step 12.
Create the proposed Y8_Wedge corridor DTM. Check the in the following settings in the Create Surface dialog box. Apply and Close out of the Create Surface dialog box.

New Surface for Each Corridor: (checked) Empty Design Surface: (checked) Add Transverse Features: (unchecked) Add Exterior Boundary: (unchecked) Features: (unchecked) Components: (unchecked) Action: Apply then Close

Step 13.
Save the r2012_rdy.ird.

Step 14.
Close out of Roadway Designer.

Step 15.
Activate the Geopak Draw Cross Sections from Surfaces dialog box.

Step 18.
Enter the following settings in the XS Cells tab.

Job Number: RDY Chain: Y8 Pattern: By Station Begin Station: 11+00 End Station: 46+00 Even: 50 Left Offset: 150 Right Offset: 150 Action: Surfaces Tab

Step 19.
Add the following DTM files in the Surfaces tab. Remember the only DTM file that needs the symbology defined is the existing ground DTM (r2012_ex_surface.dtm).

• Y8_Wedge.dtm
• r2012_ex_surface.dtm

Step 20.
Draw cross sections.

Step 21.
Process the following preset input files to generate Geopak quantities reports of the pavement layers.

• Y8_PvmtS95x.inp
• Y8_WedgeS95x.inp
• Y8_WedgeI190x.inp
• Y8_WedgeB250x.inp

NOTE:

Pavement wedging quantities as well as other quantities can be reported inside Roadway Designer, not having to go through the Geopak cross sections method. Starting with SS2, a report can be generated using the "Approximate Component Quantities" feature.