Divided Highway with 2 different profiles

[Anonymous]

Hi all;

I am intending to design a divided highway with a depressed median (6:1 slopes each side), having each median edge a different profile. The depressed median stock subassembly does not have the possiblity of using 2 profiles.

As I have 1 Hz alignment and 2 V alignments I am not able to use offset alignments (it takes a separate set of Hz and V alignments). Even if I were able to do it, I do not know how to build the median because the slopes will not meet in the CL and I do not see the use of a Mark Point.

Any ideas?

Thanks!

[Joe-Bouza]

Two offset assemblies and a LinkSideSlipe generic link

[wfberry]

Joe:

You need to go back and read what you write.  Check out what subassembly you were thinking.

Bill

[Anonymous]

Thanks.

Yes, I know I could use offset assemblies which would allow me to use two different profiles. The issue comes when building the median ditch: both sides run on a 6:1 slope, so the shear point will vary as the elevation of the hinge point will not be the same on both sides ( I guess I cannot use the link and offset assembly for that).

I wonder if there is a way to build such typical section with the stock subassemblies

[Joe-Bouza]

As Bill Was kind enough to point out my typo . To build the ditch you can use LinkSlopeBetweenPoints

[Anonymous]

Thank you for the reply. I managed to create an assembly with offsets, but apparently it is impossible to use the superelevation data.

Also, I had to create a fake profile for the main baseline as Civil 3D would not allow me to use LEB profile on the main baseline and on the right offset at the same time.

At least I had the median slopes working.

Any ideas as to how to fix the issue with the superelevation?

Thanks!

[Joe-Bouza]

You asked fir the ditch and now you want more.... lol

it has to be possible it’s done all the time. I don’t have an answer right now. 

https://knowledge.autodesk.com/support/civil-3d/getting-started/caas/CloudHelp/cloudhelp/2017/ENU/Ci...

[Anonymous]

The example you are linking is the typical divided road, with no offset assemblies nor 2 different profiles.

Thank you though, Joe.

[Joe-Bouza]

In a pinch you can profile the se transition and target 

[Anonymous · Accepted solution]

I finally got it!!!!!!

I set the alignment as divided crowned pivoting around centers (Crown).

I insert a Link to Offset and Elevation (LOE) and attach my outside lane, outside shoulder and my inside lane (Inside Lane RT would be a lane on the left of the Outside Lane)

Insert a Mark Point on the right edge of my median.

Insert a Median Depressed subassembly with the previous Mark Po

int as a target.

I build  corridor setting the offset target of the LOE where the crown should be and using both profiles (EB and WB) as elevation targets.

[Joe-Bouza]

Nicely done👍

I toldja itcudbedone

[Joe-Bouza]

Hi @Anonymous can you explain the construction of the assembly a bit more? I'd like to understand it better

[Anonymous]

The key here is the "Link to Offset and Elevation" subassembly. The rest of subassemblies hinge around it, as the lane subasembly is placed at the offset and elevation targets set for the LOE subassembly. In other words, the end of the LOE Assembly is extended towards the alignment/polyline selected as "Offset Target" and the profile selected as "Elevation Target". Lanes and shoulders get the superelevation from the alignment (Lane Exterior, Lane Interior and Shoulder Exterior).

I could have chosen the "LinkSlopeBetweenPoints" for the median construction as it does the same as the "Median Depressed"

[Joe-Bouza]

Thanks

What still has me perplexed it I see in your image the left pavement constructed off the LOE but what is the Right side attached to?

thanks

[Anonymous]

Yes. Even though the Right interior lane has to be a left sided subassembly it works.

I could not see another way to attach a subassembly towards the CL.

[Joe-Bouza]

Sorry I'm dense. I still dont get how it is built? I appreciate your patience

[Anonymous · Accepted solution]

The LOE is set as the link not shown: that is why you don´t see any links. What you are seeing is the median subassembly on the left and the Mark Point on the right (above in the hierarchy).

Attached is the drawing with the assembly. You will check by yourself how it works

[Joe-Bouza]

Thanks. Much appreciated

[Joe-Bouza]

Excellent. Great help