raised median tutorials

[Sam-I-am]

civil 3d 2011, Are there any good tutorials or videos on creating raised median divided roads with the bull nose.

I am using one alignment and profile, the profile defines the lip of gutter of the outside lanes.

but any general videos on the topic will help.

[castled071049]

I will toss in my two cents worth here, but others will have different opinions. I don't use an assembly with a raised median. I create my corridor as though there are no medians. I first get the design where I want it (matching existing driveways, taking drainage sumps into account, desiging intersections, etc.)

I then add the medians in as pasted surfaces as the last step. I turn the flowline of the median curb into a feature line, project it up to the corridor surface for elevations, use the feature line offset to get the back of curb, add them to a new surface ("Median 1", for example), then paste that into a new, overall surface that has the corridor surface already added.

It's simple without dealing with the complexities of corridor medians crossing over centerlines for turn lanes, etc., and it automatically includes bullnoses. Also, the number of regions is reduced as you won't have regions with medians and regions without medians to deal with. The downside is, if vertical changes to the road corridor are made, you have to reassign elevations to affected medians as they are not dynamic to the corridor. However, even with a median-driven corridor assembly, you will have to deal with feature lines for the bullnoses, so changes will still require feature line manipulation. Another downside is you will have additional surfaces to deal with to the extent that you have medians. I haven't found this to be a problem, but you should be aware of it.

I'm interested to see how others deal with corridors with medians.

[Joe-Bouza]

Ditto

[OMCUSNR]

Do the medians show up in sections that way?

Reid

[wfberry]

Sure, if you make a surface of them and don't forget to sample that surface.

Bill

[OMCUSNR]

Got it.

[Conrad_A]

I am also interested on how other people approach the subject. I watched a video at Autodesk University. It was called UnConditional Corridor Love. Towards the end the speaker talks about using the EOP as an alignment for a median. He creates a corridor surface and then pastes that surface into a new surface. He is able to use the corridor surface as a profile for said alignment. Adding the assembly of a baseline and curb in the corridor it creates a bullnose and is fully dynamic.

I haven't be having much luck with this method because my corridor keeps wanting me to update it.

[sboon]

This thread may be of interest.

Steve
Please use the Accept as Solution or Kudo buttons when appropriate

[fcernst]

These workflows you guys are coming up with make my head spin and give me a headache...Why are you not using the Median subassemblies? 

[mike.barkasi]

I create the median similarly to sam-i-am... however my method appears to be a little more streight forward...

once the median is placed, rules associated with the elements allow the median to update with the movement of the corridor, whether vertical Horizontal or in super the median updates.

The video below shows the process for building a raised median.

http://www.youtube.com/watch?v=8s4fSe7R1rU

HTH

Mike Barkasi

Bentley Civil

[Conrad_A]

Steve, I followed your workflow using the thread you suggested. So far so good.

[Parabolicsecan]

WOW! I just went from having a headache to breathing a huge sigh of relief with that Civil Cell workflow. Given my small shop had not decided between AutoCAD Civil and Bentley to perform functional designs, this may be the game changer for us given most of our corridor studies and design work is for urban corridors. Are the same Civil Cells available in the Power Inroads SS3? Can this approach with Civil Cells also be used to design driveways along a corridor?

Thanks.

[fcernst]

I use the various Median subassemblies. This way it's fully dynamic, one surface, etc.....just like a regular Corridor.

[Hammer.john.j]

I guess next time the original poster (O.P.) should be more specific and ask for AutoDESK tutorials and video's...

....anyways to the O.P., we've done this both ways with a couple of lessons learned:

1.  Out of the box assemblies are not customizable and become frustrating, using custom assemblies makes this task easier in the long run.

2.  Even a custom assembly can be difficult to use for achieving the desired results with turn lanes, etc

I'd follow feature line approach.

[fcernst]

Do those Feature Line methods leave a chance of the crown ending up within the Left Turn lane?

Do the Earthwork and Materials come out right?

How do they look in Section?

[Sam-I-am]

thanks everyone for solutions. I guess at the end of the day, there is nothing simple.

Given that autodesk sometimes scans these DG, I am sure if they had a better solution  they would have chimed in.

especially as one post point to a solution in a competitor’s product.

My mistake for not saying that I already have civil 3D and need a CIVIL 3D solution.

One would think that, than was obvious by me posting on a Autodesk civil 3D site. Nice to know that someone that has a different product has a solution but it does not help me.

yes we can use feature lines but as the corridors are designed to use assemblies.

Besides it's that the workflow that Autodesk is pushing.

Ernst may have something promising

[Conrad_A]

Ernst,

Using median assemblies. how do they handle the bullnose?

[mike.barkasi]

Who is they?

[Conrad_A]

I was referring to the median subassemblies

[mike.barkasi]

They are

I can be emailed for additional libraries

First name dot last name at Bentley dot com