Learn how to prepare Civil 3D for creating intersections by breaking up corridors into regions. This article provides a detailed walkthrough of the process, covering everything from assigning assemblies to setting region parameters.
Key Insights
- Corridors in Civil 3D can be broken up into regions, which are defined by a start station and an end station. This is the area between two grips, and it is essential for creating intersections.
- Regions can be changed and assemblies assigned to them in order to alter the assembly used in a certain station range. This is achieved by adding additional regions.
- After breaking up a corridor into regions and assigning assemblies, it is necessary to set all targets and rebuild the corridor. This process prepares the system to create intersections at specified locations along the corridor.
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In this video, we're going to prepare ourselves to be able to create some intersections inside Civil 3D. And to do that, what we need to do is break our corridors up into regions.
So what you can do inside Civil 3D is that if you select a corridor and you go to your Corridor Properties, what you have here is you have options for Add Baselines and then inside of individual baselines. So a baseline is a start station and an end station. So in between this start station and this end station, you can have regions.
And so the region for this is between 0 plus 44.24 to 8 plus 54.4. And that basically is the area between this grip here and this grip here. Now, if I want to create a break or change the assembly that I'm using, so you can see here, I can select an assembly and assign it. If I wanted to change the assembly in a certain station range, then I would need to add additional regions.
We're going to change the regions for this corridor. We aren't going to be changing the assembly, but we will be breaking it apart so that we're ready to kind of insert our intersections in. So what I'm going to go ahead and do is I'm going to turn this alignment into two different regions.
I'm going to have a region inside between our branch alignment and our highway. And then I'm going to have the remainder of this corridor here. So I'm going to go ahead and select this BLDEV.
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I'm going to right-click. I'm going to select Add Region. And then from here, I'm going to go ahead and leave the region name as is and click okay.
So from here, what we can see is we have a region from 0+44.24. And then we have a region from 8+54.4. Now, this doesn't have anything associated with it for the assembly.
I'm going to go ahead and drop down and assign my Dev Assembly to it and click okay. And then I'm going to go ahead and go back into these Frequencies as well, because I want to make sure I have at least my Curve Increment set to five, like I had in the other one. I'm going to go ahead and hit okay.
And then the other issue you're going to notice here is that our targets aren't set. We're going to go ahead and click Set All Targets and select CIV202 as our Surface Target for all targets and hit okay, and then hit apply. Civil 3D is going to ask us to rebuild this corridor.
And so if you notice, once I select this region here, it shows this portion. I select this region here. It doesn't show anything.
And that's because what we need to do is go ahead and set our Region Parameters. I'm okay with it being 44, but I'm going to go ahead and set this endpoint for this to somewhere in this location here. We have a very small region in here.
And then this region here, I want to set the start point as somewhere here. And then I want to set the endpoint as right there. And I'm going to go ahead and hit apply, rebuild, and hit okay.
And so what we're going to notice here when I do that is that now I have a corridor in this location and a small sliver of corridor in this location. And so this preps us to be able to create an intersection at this location and at this location along this corridor. Now I need to do the same thing with my highway.
I need to break this into two separate regions. So I'm going to go ahead and select the corridor, go to Corridor Properties. I'm going to go ahead and go onto this Baseline, right-click and select Add Region.
I'm going to go ahead and drop down and choose highway and click okay. And so from here, I'm going to notice that I have this one that says VAR. I'm going to go ahead and change this, the one that says 25.
I'm going to go to Curve Increment and put 15 so that it matches my other region. Then I'm going to go ahead and go to targets. I'm going to go ahead and click here to set all.
I'm going to click CIV202. And then I'm going to go ahead and go to width. I'm going to click on the none.
I'm going to go ahead and set my target as my Existing Highway Right and click add. I'm going to click okay, click okay. And then I'm going to set these baselines.
So I'm okay with zero. I want to change this end baseline. So I'm going to go ahead and pick somewhere in here.
Then I'm going to go over to this one. I'm going to go ahead and select my beginning and select it somewhere in here. I'm going to be okay with it being at 5+90.88 as the end.
And I'm going to go ahead and hit apply, rebuild. Okay. And so what we're going to see here now is that we're all prepped to insert an intersection into this region here.
So what I'm going to do next is I'm going to save and then I'll meet you in the next video.
