AutoCAD Civil 3D

[#1]

Hi All,

I'm a looong time forum member, just working under a new name for the time being.  II was hoping to get your thoughts on the conceptual design process for a new subdivision with say 100+ lots, and 5-6 roads within it. 

What I'd like is to learn a workflow that lets me adjust the alignments/profile with a minimum amount of effort to re-layout 100+ lots, and which lets us explore design options more interactively.  Once we pin down a few alignment options, I would create a simple corridor with multiple baselines to develop the grading concept.

One thing that irks me so far is that the Create ROW command is nice, but it's not dynamic to the alignments.

How do you handle cul-de-sacs on this process?

[#2]

Instead of using the Create Right of Way command, try using Offset Alignments instead. Put them in the same Site as your parcels and they will define your right of way and will be dynamic to the centerline alignment.

[#3]

Yes, yes, to Hailey you listen, mmm hmm hmmm. 

Create a left offset and a right offset, and then whatever changes you make to the CL alignment, the offset alignments will come along for the ride.

If you want to get really fancy (like me) you can create a seperate alignment style that makes your offset alignments appear as ROW lines, with the correct layers and linetypes, yada yada yada.

[#4]

---

owenmull wrote:

Yes, yes, to Hailey you listen, mmm hmm hmmm. 

...with the correct layers and linetypes, yada yada yada.

---

Don't you mean, "yoda yoda yoda"?

It's times like this I'm bummed I can only give one kudo!

[#5]

Maybe I'll get you a new jokebook for Xmas....................

[#6]

This is worth more than one kudo.  I am definitely stealing this idea.

[#7]

too simple your answer, I think!

http://www.interstateauction.com/2008-06june-05_Jackson_Bridge_Subdivision_Lots/Jackson_Bridge_Subdi...

That's the kind of think I'm dealing with (but larger).  A nice big network of roads, very hilly, and I'll need to make a lot of adjustments to the alignments as I try out different concepts.  The offset alignment would only paralell my main alignment, not cleaning intersections, etc. 

[#8]

You should be able to use the intersection wizard for that.  It's not going to help you with the culdesac bulbs but you should be able to define either a radius for the property corners at the intersections or a chamfered corner if you prefer.

For the culdesacs you can create an alignment using the Fixed curve - center point and radius, and then add free or floating curves to tie into the alignments which parallel the centerline.

[#9]

A sample drawing for those who want to experiment with this workflow.

[#10]

---

stevekoss wrote:

too simple your answer, I think!

---

The simple answers are always the best answers!

I would do CL alingments, then offset alignments for your ROW, create your parcels, then use the intersection tool for intersections, and use Steve's method for creating your cul-de-sacs.