Transition between assemblies

[Anonymous]

How do you create a gradual transition between your assemblies on your road corridor? I have a crowned assembly in one of my regions and then one that slopes 2% accross the entire road surface in another region, but where they meet it is an abrupt transition. I need it to be gradual over 75 feet.

[Civil3DReminders_com · Accepted solution]

Superelevation and a subassembly which gets it's slope from the superelevation.

Christopher

[Anonymous]

start the second assembly 75 feet from the end of the first?

Joe

[Anonymous]

Joe's suggestion does work in some cases. The corridor will connect the gap
between the assemblies with breaklines. Give it a try. If it doesn't connect
the gap the way you like, you can play with the settings for how the
corridor connects point codes between assemblies.

"Joe Bouza" wrote in message
news:6317385@discussion.autodesk.com...
start the second assembly 75 feet from the end of the first?

Joe

[Anonymous]

Neil's warning is correct particularly in the vicinity of a vertical should
be avoided.

Joe

[klugb]

If you are using a subassembly that allows it you can create a profile to control the ETW. This gets a little tricky if you have any horizontal widening though.
Bruce

[Anonymous]

I'm trying to do the same thing - gradual transition from a crowned roadway to one with superelevation, along a curve.  Leaving a gap connects the two regions with straight lines.  How do I get the transition to follow along the curve of the alignment?

Thanks!

[Joe-Bouza]

My suggestion was predicated on the region being straight and no vertical curve.

In a curve you probably should use super elevation. I never bother myself since most of the work I do would require any SE. But I have used the caveman method to do a transition every so often.

create your corridor with the two assemblies and leave a gap the length you want to transition

Then create a profile from the eop feature line of corridor

the profile will more than likely come in broken due to the gap in the corridor - no matter - use it to develop the eop profile. If there is a gap, all the better, connecting the two will give you the transition rate over L to get to 2%. Same process for the other side.

Once you are done you no longer need the 2% assembly - run the normal crown the whole way and target the eop profiles developed from the first run. Note in the region of the curve(s) you will want to make frequency closer.  This thesis also assumes you are using a outsideSuper pavement sub or any that will let you target the ETW

[Neilw_05 · Accepted solution]

You can also achieve the transition by means of a featureline snapped to the ends of the assemblies on the ends of the transition. It can be a curved featureline or polyline, but a featureline should automatically adjust to the elevations of the corridor when edited. Use the featureline as a vertical target for the corridor assembly through the transition, making sure the assembly can follow a target..

[Anonymous]

Using polylines as targets resolved the issue.  Thanks for all the help!

[Anonymous]

can you explain how to do transition corridor between two

[jmayo-EE]

Try making an assembly for the transition that has marked points placed on the ends of a linkwidthandslope to target the ETW L&R. The linkwidthandslope should be configured to not display the link so only the marked points connect.

[BrianBenton]

How do you target the ETW? There is nothing there to target? I have a case where I have an inverted crown transitioning to a typical crowned road. It's difficult because the alignment is on a curve that goes into a reverse curve so just leaving a gap between assemblies doesn't do it.