Hello,
I'm modeling interchange on-off ramps for a highway interchange. I would like some storm brain ideas on how people is modeling this with corridors.
I have been able to model it using offset assemblies, and I believe it works fine, however when two ramps merge together, the alignments are not parallel. The only issue I have with this is when cutting a sample line to display this in cross sections, the superelevation slopes for one ramp show as they should, but obviously the super for the other ramp don't represent the correct superelevation slope. This is because the sample line is not radial to the secondary alignment. I don't see any other way to achieve this other than adding some sort of note to the cross sections?
I should note both ramps have different superelevation rates and tranistion happens within the gore area where the two ramps merge, eventually the two ramps meet, and superelevation rate is the same for both.
I believe offset assemblies is the correct way to model this, but I would like to hear what other people is doing out there.
Thanks in advance
If you're on subscription this may help Highway Interchange Design
Allen Jessup
Engineering Specialist / CAD Manager
I'm on subscription, however the link doesn't work. How can I find this document there?
There are some classes at utodesk University online. One was done by Andrew Walther.
Google "Civil 3D modeling highway interchanges". It's the first link. You'll have to sign in to view the file. If you don't have a password set up - see the Training page of the Subscription website.
Allen
Allen Jessup
Engineering Specialist / CAD Manager
That's the one my link should point to.
Allen Jessup
Engineering Specialist / CAD Manager
Yeah. I somehow messed up the link. I "think" this one will work. http://au.autodesk.com/?nd=class&session_id=1179
Allen
Allen Jessup
Engineering Specialist / CAD Manager
My apologies. It looks like that class is no longer available.
Allen
Allen Jessup
Engineering Specialist / CAD Manager
Perhaps this one?
No I already looked at that and it doesn't go in to the full details on how to setup the corridor
you may wish to see this class at Autodesk University. the last part of it talked about ramps and gores. you also may follow him step by step as he's attaching materials he used in his class.