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Interchange Ramps

12 REPLIES 12
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Message 1 of 13
francisco_bobadilla
2039 Views, 12 Replies

Interchange Ramps

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

12 REPLIES 12
Message 2 of 13

If you're on subscription this may help Highway Interchange Design

 

 



Allen Jessup
Engineering Specialist / CAD Manager

Message 3 of 13

I'm on subscription, however the link doesn't work.  How can  I find this document there?

Message 4 of 13

There are some classes at utodesk University online.  One was done by Andrew Walther.

Matt Kolberg
SolidCAD Professional Services
http://www.solidcad.ca /
Message 5 of 13

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

Message 6 of 13
AllenJessup
in reply to: mathewkol

That's the one my link should point to.



Allen Jessup
Engineering Specialist / CAD Manager

Message 7 of 13

Yeah. I somehow messed up the link. I "thinkSmiley Tongue" this one will work. http://au.autodesk.com/?nd=class&session_id=1179

 

Allen



Allen Jessup
Engineering Specialist / CAD Manager

Message 8 of 13

My apologies. It looks like that class is no longer available.

 

Allen



Allen Jessup
Engineering Specialist / CAD Manager

Message 9 of 13
Jeff_M
in reply to: AllenJessup

Perhaps this one? 

Cloverleaf Interchange Design

http://au.autodesk.com/?nd=class&session_id=4994

Jeff_M, also a frequent Swamper
EESignature
Message 10 of 13

No I already looked at that and it doesn't go in to the full details on how to setup the corridor

Message 11 of 13

Does someone has the handouts saved for this class?

Message 12 of 13

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.

 

Message 13 of 13

I think this AU class will be helpful 

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