Roadway Designer - pavement warping vs. superelevation

I am new to Geopak Corridor Modeler and am struggling with superelevation.  Actually, pavement warping would be a better description.  I have stations and cross slopes at exact locations for how we want the pavement to tip and where; at the beginning of my highway, going from a 4 lane undivided to a 4 lane divided.  So I have independent alignments (as well as profiles) on the inside edge of my pavement as it diverges.  I have point controls assigned to that inside edge to find both the horizontal and vertical location, and it is that location we want the "superelevation" to pivot about.  So I don't need to use the Superelevation Wizard in order to pull tables, AASHTO, or fixed length.  I'd like to be able to get to the Superelevation Section Definitions without having to go through the wizard.  It would seem like I need a "dumbed down" version of superelevation to simply transition the cross slopes of my pavement.  I'm wondering since it is not a traditional superelevation in the sense that it doesn't straddle the PC and PT of a curve, seems to be bucking all of my attempts.  Help! 

  • If you go into Superelevation view mode on the bottom of the window (under Normal and above Overlay) you can right click on the Superelevation window and add your own points and controls as you desire and control the % and stationing without having to go through the Wizard. There's a multitude of options in the Right Click menu what you are looking for is either editing existing points or creating a new single control line. See attached screenshot.

  • A couple of thoughts on your design issue:

    1) It would be helpful to see your template and alignments to know what your issue truely is. How you have built your template will affect the precise means of resolution. When your 4 lanes divide, does each 2 lane pavement develope a crown in the center of pavement or do the lanes remain planer?

    2) Have you considered Parametric Constraints in place of Point Controls and Superelevation? What about a Style Constraint? I do not like using Point Controls unless I have to. I reserve them for making final adjustments to the design.

    3) You mention using Point Controls to control the horizontal and vertical position of the inside edge of pavement. Are those Point Controls interferring with the Superelevation control lines? Superelevation control lines are just a special type of Point Control. Depending on how your template is designed I can see how you might have some issues with conflicting Point Controls.

    The biggest difficulty to solving your issue is that there are several different ways to do it. The BEST solution will depend on your design situation and your personal workflow preference.

  • thank you!  I since have had an online meeting with Bentley to help.  I eventually used a little of both methods - parametric constraints as well as superelevation in another station range.  it was a little clumsy, but I think I have desired results.  I appreciate the post, good advice I eventually used.