Project Stationing

I typically do what Vern said in the second part of his post. Create your PGL profile along the CL element, and then project that profile out to the PGL element. I have my linear stroking at either 5 or 10 so that the vertical curvature comes in reasonably smooth.

Another thing I just recently did was I had to have my PGL's tie to existing elevations or even proposed EOP elevations from another roadway. When this is the case, you can create construction lines to project that elevation back to your CL so you can get the correct elevation on the PGL. When doing this, you need to watch our for your dependencies.

For example if you are trying to match existing on your PGL at the begin project, I would create a dummy construction line for the PGL extending from before the Begin Project, right up to the begin project. Make sure that line is not dependent on your PGL, ie dont snap it to the beginning of your pgl, snap it to something else independent of that. Then just draw a line from the CL at 90 degrees to the end of that line to project that elevation back.

Hopefully that made sense, but if not I can try to explain it better with some pictures later.

Good luck

I typically do what Vern said in the second part of his post. Create your PGL profile along the CL element, and then project that profile out to the PGL element. I have my linear stroking at either 5 or 10 so that the vertical curvature comes in reasonably smooth.

Another thing I just recently did was I had to have my PGL's tie to existing elevations or even proposed EOP elevations from another roadway. When this is the case, you can create construction lines to project that elevation back to your CL so you can get the correct elevation on the PGL. When doing this, you need to watch our for your dependencies.

For example if you are trying to match existing on your PGL at the begin project, I would create a dummy construction line for the PGL extending from before the Begin Project, right up to the begin project. Make sure that line is not dependent on your PGL, ie dont snap it to the beginning of your pgl, snap it to something else independent of that. Then just draw a line from the CL at 90 degrees to the end of that line to project that elevation back.

Hopefully that made sense, but if not I can try to explain it better with some pictures later.

Good luck

Yes, that is a great Idea! I was just reading what elev I need to tie and and force my profile manually. I will definitely do that technique in the future.

However, in my initial question I was thinking of horizontal stationing, The Issue I am running into is once I create a pgl and combine the elements to create a complex chain, I would like the horizontal chain to have the same stationing as my CL. That way when I have project my profile from the CL the station would make sense in the profile view.

Thanks again guys

We have always used a single centerline for divided, parallel roadways with a single profile showing along the centerline, but indicated on the typical sections the PGL location to apply the centerline elevation. if we felt the need to show the two existing ground profiles, we would project them to the centerline profile. Usually, that was not considered a necessity.
We often also showed side ditch elevations on the centerline profile. This prevented any need to translate a ditch station to a centerline station or visa-versa.
If the two roads needed separate centerlines, then we would switch to dual profiles as we now had dual alignments.