Rural intersection: create corridor datum surface

Total video time: 5:03

Last updated: 2020-10-26

Exercise files: rurl-int-cr-rgn-02-end-data-c3d16.zip

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

rurl-int-creat-crdr-datm-srfc-01.mp4 5:03

Now we will create data surfaces from the corridor. Because the top and datum surfaces overlap in a lot of areas we use a surface progression to not duplicate the data. Conventional surface progression truncates the top surface where the top and datum meet- daylight areas of the back of the curb and gutter. The alternate progression is the opposite where the top goes to the daylight and the datum is truncated. You can find more on this by searching for Surface Progression in the C3DKB.

  1. Select the corridor > Right-click > Corridor Surfaces > Surfaces tab > Create Corridor Surface > Rename it Crdr-25-Datum

  2. Data type > Feature lines
  3. Specify code
    1. Crown_Sub
    2. Daylight_Sub
    3. ETW_Datum_CG
    4. ETW_Pave1_CG
    5. ETW_Sub
    6. ETW_Sub_CG

  4. Boundaries tab > right click Surface > Corridor extents as outer boundary

  5. OK > Rebuild Corridor

  6. To check the surface right lick the surface in Prospector tab > Surface Properties > Surface Style > P Contours 2' Major: 0.5' Minor

  7. Save the file
  8. Right click on Data Shortcuts > Create Data Shortcuts > select the surface