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Interchange - Model Slopes at Bridges?

jcallicott
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Greetings-

I am running InRoads 8.09.03.06 with MicroStation 8.09.04.88. 

I am currently modeling an interchange.  I think I feel comfortable enough with the basics, but one task that has come to mind is when I get to bridges.  My roadway will need to stop, and my dirt slope down to a catch point on my existing surface under the new bridge.  Thing is, the feature representing the slope cath point will be perpendicular to my roadway centerline. 

Is it possible to build this slope into my model using Roadway Designer?  If so, what might anyone suggest as a "best workflow" for accomplishing something like this?  The real trick will be having one corridor that begins, proceeds along on fill up to the start of a bridge, the dirt tapers off, as the bridge starts, then one gets far enough to where the bridge will end, the dirt tapers up, and the bridge ends and the ramp continues on fill. 

Also, is it possible to build the bridge slopes and represent the bridge using components, without the need for a seperate surface?  I know I can represent the bridge components in a seperate corridor and surface, if needed. 

If push comes to shove, I can add the features for the bridge slopes in manually (i.e. wireframe) after Roadway Designer is done.  But RD is a powerful enough tool that I am thinking I may not need to do that. 

Any input is appreciated!

Parents Reply
  • in reply to Chris Dry

    I looked over the demonstration yesterday and came up with a variation on the same solution.  I am running Geopak so I had to go a slightly different route.  I do not think that you can apply a profile to a plan graphics element.  Here is a workflow that I used.

    1. Use the last transverse feature.
    2. Draw a line from feature to feature.
    3. Edit the elevation.
    4. Extend the line back to the transverse feature.
    5. Rotate to Top view.
    6. Offset line the desired berm width.
    7. Draw a line between the ends of the 2 offset lines.
    8. Fillet a radius between the front of the berm line and the short drawn line.
    9. Delete the line drawn in step #2.
    10. Connect the lines into a single linestring.
    11. In cogo, place a point at the beginning point of the new linestring.
    12. In "Store Graphics", type in the point number from #11, set drop down to single element
    13. in Geometry, Layout Profile (VPI Based), plugged in the beginning and ending station using the elevation from #3.
    14. Under CM, imported the new alignment #12 and profile #12.
    15. Under Roadway Designer Corridor Management, created a corridor for the endbent.
    16. Template Control, added templates for the slope and end bent.  Making sure that they are facing the proper direction.
    17. Set the template spacing really close around the fillet curve area.
    18. Save, create surface

    View the picture for what I ended up with for my slope.

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