I am trying to figure out how to design my templates around my PGL. Before, Iassumed my PGL was always 0.5' below the median, and I showed all grass medians as being 2% crowned. I know this is incorrect, because the PGL location varies throughout the project. The only sections that the medians aren't crowned is where there is turn-lane medians. So, I would like my templates to be based on where my PGL is (can be seen with the PAVE and ALIGN files). I would like a one-template-fits all approach if possible. I attached my .ITL file, which the main template I've been using is called "FM 548 ProposedCondensed". I also attached typical section that represents generally what a turn-lane median section looks like.
0333.FM548-PAVE.dgnFM548-PROP TYP03.dgn
Derek:
Did you ever figure out how to work out this situation? I have a similar situation which I am attempting to work through as part of my testing procedures for the software (ORD 2019 R1).
Mark
I have created templates that are only correct once a number of point controls are assigned. I may or may not have a point (NULL or otherwise) at the 0,0 location, but usually there is a point at the center of the template horizontally and the PGL point(s) of the road surface is defined with a horizontal constraint from that center point. Then I would assign a vertical control to the PGL point(s) tied to my profile. Then everything else in the template is in some way constrained from the PGL point(s).
If you create a PGL point at 0,0 and constrain you road PGL point(s) to it with H & V constraints, you can dispense with the point controls and the median will get created from whatever constraints you have defined. Sometimes you need to confirm that the median forms under all conditions, or use display rules to address situations where the crowned median fails to form appropriately. Usually, that means a simple inclined face, sloping left or right when the crown point is no longer actually in the median.
I once had to model where a light rail corridor was coming out of a tunnel in the median of a road. The road was tied to one profile and the light rail was tied to the rail profile, so nothing was actually tied to 0,0 in the template.
Charles (Chuck) Rheault CADD Manager
MDOT State Highway Administration
Indeed, Chuck. I suppose that my inquiry was more in line of how to perform the Operation in ORD Connect Edition. In SS2 I would merely assign those PGL points to vertical alignments (children of the primary Horizontal) and let them be controlled via those vertical alignments (pretty much what you have stated already).