The fewer things I have to keep updated, the better.
So when I find a shortcut that does the job, I feel the need to shout it from the rooftops.
If you are holding the crown of your main road, you can let the TIN fill in some blanks for you instead of having a second target for the main road EOP.Â The main road EOP alignment and profile are tricky to keep “dynamic” and bring in another element of editing.Â Whereas, my corridor “smarts” about where EOP lives is always dynamic to my corridor, and once I rebuild the corridor and the TIN all should fall into place.
So let’s skip the whole main road EOP alignment and profile.
(yes I know there is software that can help me improve the small versions of these images.Â Until I figure it out, just click on each image to take you out to a sharp, full sized version)
Organize your corridor into baselines.Â Think about what you need.Â I am not going to go into corridor theory right now, I am assuming you have taken a stab at intersections before.Â So I am leaving out how to make the transition alignments, and their associated profiles as well as how to make the assemblies with a transition lane.
So we need 5 Baselines here…. Depending on your intersection, you can usually get away with 3 regions for the Main Road instead of separate baselines.Â
However in a 4 way intersection your secondary road centerline must be split into 2 baselines NOT 2 regions because a baseline with an empty station range still tries to make the feature lines that would cross through the intersection.Â Boy, that is hard to say with words.Â Regardless, it will smack you in the face the first time you do it and you will know what I am talking about.
Â You need, in addition to your “Normal” and “Almost Normal” assemblies, two like this:
Make your regions on your Curve EOP baselines, and assign the Secondary Road Alignment/Profile as a target for the assembly with the lane, and no target for the second one. (Note that any weirdness here may be fix by reversing your alignment and coming up with mental conventions for which direction your alignment runs and which side your lane subassembly is on)
Build the surface from your corridor.Â Your TIN needs a little help, but no worries.Â The good news is that these edits appear to “stick” upon corridor rebuild, so you only have to do this once.
Swap edges and be sure to rebuild your surface.