Rural intersection: create mainline assembly with conditional subassemblies

Total video time: 8:26

Last updated: 2025-10-17

Exercise files: rurl-int-cret-mnln-asmbly-cndtnl-01-begin-data-c3d16.zip

Start with: 12345678\Design\Corridors\Crdr-25-4thAve.dwg

rurl-int-creat-mnln-asmbly-cndtnl-01.mp4 4:48

Here we will build the assemblies for the corridor design. These assemblies will use conditional subassemblies so one assembly can do much of the design work for the entire intersection. This is an optional method; a more traditional method would be to build a series of assemblies that react to regions in the corridor which we will cover in the side roads design.

  1. Home > Create Design > Assembly > Create Assembly
  2. Name it 25-FullSection- something to easily identify later
  3. Place in drawing by other assemblies

  4. WisDOT Design > WisDOT & Civil Imperial > Lanes tab > LnExtendBase

  5. Accept the defaults and select the assembly twice to add the sub to each side

  6. Tool Palette > Conditional tab > Conditional Horizontal Target
  7. Place a Target Not Found and a Target Found at the right edge of the roadway

  8. Place a Target Not Found at the end of the Target Found Subassembly

  9. Tool Palette > Lanes tab > ShldGeneric

  10. Use the default parameters and attach to the Target Not Found subassembly

  11. Tool Palette > Daylights & Slopes tab > DaylightProfileControlled
  12. In the Parameters box
    1. Ditch/Fill switch > Ditch to create a ditch all the time even with fill
    2. Ditch backslope > 4.00:1

    3. Daylight fill slope > 4.00:1

  13. Select the outside of the ShldGeneric subassembly
  14. This conditional assembly completes the main road assembly or the areas where there is no turn lane
  15. Save to use for the next exercise

Exercise files: rurl-int-cret-mnln-asmbly-cndtnl-01-begin-data-c3d16.zip

Start with the previous exercise or start with: 12345678\Design\Corridors\Crdr-25-4thAve.dwg

rurl-int-creat-asmbly-cndtnl-02.mp4 3:38

This step will build the conditional Target Found where there is a turn lane

  1. Highlight the right lane assembly
  2. Modify Subassembly tab > Copy

  3. Select the end of the Found > Not Found conditional

  4. Highlight the curb & gutter subassembly and copy to the outside of the lane

Tip: In this condition the subassembly represents the turn lane which starts narrow and widens. The target will override the width parameter but it may start early or overlap. To safeguard against this set the lane width parameter in the subassembly properties to 0.01'

  1. In the Curb and gutter subassembly properties set the paved width to 0.00'

  2. Highlight all the conditional subassemblies
  3. Modify Subassembly > Mirror

  4. Select the outside of the left lane