3-Way Intersections

[Nikki101]

Is there a trick to making a 3-way intersection in Civil 3D using the intersection commmands?

[owenmull]

Short answer is no, there's not. The intersection tool is a very, very basic tool for laying out a very simple intersection and making a corridor out of it. If you have any sort of "non-vanilla" situation, ie valley pans, differing curb return radii, sidewalk neckdowns, sidewalk bulbouts, etc etc, the intersection tool can't effectively handle these.

I don't believe there is a really good way to "trick" C3D into creating a three-way intersection. Only thing I could think of would be to make two of the intersecting roads one alignment, and create your custom intersections assemblies and subassemblies, but Im afraid that would be just as much effort as doing it the old fashioned way.

[doni49]

Do you mean like a Y intersection?

[Nikki101]

Thanks for the Reply.  It is a "T", where Road B ties into Road A at 90 degrees.  It is a basic intersection where both roads are the same type, width, low speed - so widened approaches are not necessary.  There is really nothing funky about it other than Road B terminates at the centerline of Road A.  Please see tha attached pic.  Thanks again.

[Nikki101]

Can you look at my response to doni49's reply and confirm that your answer is still suitable for my application?

Thanks. 

[doni49]

There are many examples/tutorials explaining how to make a simple T intersection. Do a Google search for "Civil 3D corridor T intersection tutorial". That should get you pretty close.

[owenmull]

Ok. In your situation, yes, this is absolutely possible. I was under the impression from your OP that it was a complex interchange, like a Y intersection or something similar. 

Doni is right. Search the C3D tutorials in help files, and they can walk you through how to create an intersection as you desire.

[Nikki101 · Accepted solution]

Thanks again. 

My issue - discovered through a Youtube tutorial - was that I had my secondary road alignment starting at the far side of the primary road.  Apparently, for a T-intersection, the sencondary road alignment must start @ the centerline of the primary road.  By doing this, the intersection command removes the need to set parameters for the 2 "non-existant" quadrant of the intersection...  In hindsight, if the secondary alignment passes through the centerline of the primary road (as I originally had it), the intersection command forces you to set parameters for all 4 quadrants - and of course <none> is not an option....

[wiss9636]

I'm having issues creating a 3-way intersection (Y intersection). Disclaimer, I'm fairly new to C3D, only been doing this for a semester. Not sure if it's the way I created my alignments or if I need to adjust the settings differently.