I have a superelevation issue. I looked to solve it by searching stuff like "superelevation auxiliary" but not finding anything helpful. That aside, I'm not even sure auxiliary would solve my problem.
In the wiki I found Overview of Superelevation Workflow and the demonstrator even mentioned auxiliary but didn't talk about how to use it.
So, here's my scenario. I have the baseline to the left of the leftmost lane line on a ramp. This ramp has 2 lanes. The typical section indicates that it is to be crowned at the central lane line.
Here's my anticipated solution: I set up a series of superelevation sections. (A series because some curves may have different design speeds.) In each one, I create two lanes to the right: the first, called right1: 0 feet for the near edge, 12 feet width, with a normal cross slope of +2%, and set it primary; the second, called right2: 12 feet for the near edge, 12 feet width, with a normal cross slope of -2%, and set it auxiliary. Auxiliary because it is secondary and is derived from the edge of right1, not from the baseline.
It is worth noting that with the color shading, it is clear that the superelevation is the same color for both lanes through each curve, and through the normal crown sections, it's clear that the left lane is draining toward the baseline (as it should), and the right lane is draining away from the baseline (as it should).
What I'm seeing now is what I was seeing when the second lane was auxiliary. Through a curve to the left, the absolute value of the superelevation that the corridor is rendering looks right, but instead of being low to the left, it is low to the right. The superelevation of the second lane looks fine. It comes off the centerline, low to the left (as it should).
That didn't work well for me, so I switched the second lane to primary. (Meanwhile, the superelevation color shading still looks good.)
After deleting all point controls and reassociating superelevation, after fixing "Point" and "Reference Point" (which labels should be more descriptive like "Superelevation Point" and "Pivot Point", I think) for right1 are, respectively, CL and EP-L (which follows the baseline). For right2, they are EP-R and CL. What I'm getting is a crown section where each lane uses the designated superelevation slope.
At this point, switching from primary to auxiliary, I find that there is no difference.
Anyone have any advice on how to solve this?
