Modeling Superelevation Transition - Reverse Curves

Running InRoads V8i - This is the first superelevation I have tried to create in a model.  Two curves close together with superelevation in opposite direction, designed with a continuously rotating plane between curves.  I first ran the wizard to set up the calculated s.e. and it looked good.  I then went into the s.e. display and tried to modify points/control lines so that the lines passed through zero at the correct station with 0% cross-slope but the corridor is still running showing a crown break at the rotation point between curves.  Am I missing something or is there a better way to do this with roadway designer? 

  • When you use Superelevation Wizard in the last step you

    Fix Superelevation Overlaps. There is an option - Apply Full Super to Full Super Planar Transition - when checked on, no points on superelevation lines between fullsuper on both curves would be created.

    Another way is to mannualy delete these points out of superelevation lines.  Hit process all button in roadwaydesigner before checking results.

    If you have no points between fullsupers on superelevation lines, and still have crown break at the rotation point, you should chceck PointControls.

    Does it help?

  • Thanks for the tips.  I ended up making one control line for all three supers because inroads didn't connect the separate control lines completely through the level section, even though the end points of the control lines were at the same station.

  • Is there a full super to full super transition in OpenRoad Designer.  I do not see options for this.  There appears to be no good way to remove points between full super locations except to go to the editor and walk down through the point one at a time and comparing the point details with the super diagram (picture) in an attempt to locate the unneeded points between full super to full super reverse curve locations. 

     Seems the SuperElevation Editor dialog could us a number of upgrades to get it to were the SS2 InRoads superelevation editor was.

    Mike Longstreet
    Vermont Agency of Transportation
    Civil Engineering Technical Support
    VTCAD Help