














Split a corridor into segments and then create an intersection in Civil 3D.
Transcript
00:03
Civil 3D provides tools for automatically generating intersections
00:08
where two or more alignments cross.
00:11
They can be used to create standard three- and four-way intersections and roundabouts.
00:17
Intersections update dynamically when changes are made to the connected alignments or profiles.
00:23
They are made up of customizable components
00:25
such as lane configurations, curb returns, and grading slopes
00:30
that make it easy to design for compliance.
00:33
Also, intersections are integrated into the corridor model,
00:37
ensuring seamless connections between road segments and across the road network,
00:42
as well as accurate earthwork calculations.
00:45
After you have a corridor modeled, you can split it into two or more segments,
00:50
and then add the necessary intersections.
00:53
Once the intersection is ready to be evaluated,
00:56
you can use several visual and analytical tools in Civil 3D
01:00
to evaluate the intersection for sight distance.
01:04
In this example, a corridor has already been created in the open Civil 3D drawing.
01:09
The first step is to split the corridor into segments to create space for the intersection.
01:15
In the drawing, select the corridor model.
01:18
Then, from the contextual ribbon, Modify Region panel, click Split Region.
01:26
The program prompts you to select the region of the corridor to split.
01:30
In the drawing, select the region, and then select the specific split location.
01:36
Now, zoom in to the selected point and use the grips to create an opening by dragging the arrow,
01:43
making space for the intersection to be modeled.
01:47
Ensure that both alignments intersect each other,
01:51
zooming in to examine the intersection closely.
01:55
If needed, extend the alignment beyond the main alignment
01:58
to make sure that there is a definite intersection.
02:02
Now that you have a definite intersection and a profile for both the main road and the side road,
02:08
you can build the intersection.
02:11
From the ribbon, Home tab, Create Design panel, expand Intersection and select Create Intersection.
02:19
In the drawing, zoom in and select the point where the alignments intersect.
02:24
Then, you are prompted for the main road alignment.
02:28
Press ENTER to open the Select alignment dialog.
02:32
Select the appropriate alignment, and then click OK.
02:37
The Create Intersection wizard opens.
02:41
Specify the intersection name, marker style, and label.
02:46
Then, expand the Intersection corridor type drop-down
02:50
to select whether the intersection corridor should maintain the primary road crown or all crowns.
02:57
Select each option to update the preview, and in this case, select All Crowns Maintained.
03:04
Click Next to set the offset parameters.
03:08
If you want the offset roads to follow existing alignments,
03:12
you can specify them here.
03:14
In this case, skip this step.
03:16
Click Next to choose the assemblies to apply.
03:20
If you previously created assemblies for that intersection, you can use those,
03:25
or you can use the default assemblies suggested, as in this case.
03:30
Click Create Intersection.
03:33
The wizard closes, and after a moment, the drawing updates to display the intersection.
03:39
If the labels are overlapping, click and drag them out of the way for a better view,
03:44
to ensure that the intersection appears correct.
03:48
Here, you could connect the road on the right to the intersection,
03:52
but leaving a gap will enable a smoother transition between the point codes and daylights
03:57
when creating the surface from both corridors.
04:01
Now you know how to split corridor segments and create intersections in Civil 3D.
00:03
Civil 3D provides tools for automatically generating intersections
00:08
where two or more alignments cross.
00:11
They can be used to create standard three- and four-way intersections and roundabouts.
00:17
Intersections update dynamically when changes are made to the connected alignments or profiles.
00:23
They are made up of customizable components
00:25
such as lane configurations, curb returns, and grading slopes
00:30
that make it easy to design for compliance.
00:33
Also, intersections are integrated into the corridor model,
00:37
ensuring seamless connections between road segments and across the road network,
00:42
as well as accurate earthwork calculations.
00:45
After you have a corridor modeled, you can split it into two or more segments,
00:50
and then add the necessary intersections.
00:53
Once the intersection is ready to be evaluated,
00:56
you can use several visual and analytical tools in Civil 3D
01:00
to evaluate the intersection for sight distance.
01:04
In this example, a corridor has already been created in the open Civil 3D drawing.
01:09
The first step is to split the corridor into segments to create space for the intersection.
01:15
In the drawing, select the corridor model.
01:18
Then, from the contextual ribbon, Modify Region panel, click Split Region.
01:26
The program prompts you to select the region of the corridor to split.
01:30
In the drawing, select the region, and then select the specific split location.
01:36
Now, zoom in to the selected point and use the grips to create an opening by dragging the arrow,
01:43
making space for the intersection to be modeled.
01:47
Ensure that both alignments intersect each other,
01:51
zooming in to examine the intersection closely.
01:55
If needed, extend the alignment beyond the main alignment
01:58
to make sure that there is a definite intersection.
02:02
Now that you have a definite intersection and a profile for both the main road and the side road,
02:08
you can build the intersection.
02:11
From the ribbon, Home tab, Create Design panel, expand Intersection and select Create Intersection.
02:19
In the drawing, zoom in and select the point where the alignments intersect.
02:24
Then, you are prompted for the main road alignment.
02:28
Press ENTER to open the Select alignment dialog.
02:32
Select the appropriate alignment, and then click OK.
02:37
The Create Intersection wizard opens.
02:41
Specify the intersection name, marker style, and label.
02:46
Then, expand the Intersection corridor type drop-down
02:50
to select whether the intersection corridor should maintain the primary road crown or all crowns.
02:57
Select each option to update the preview, and in this case, select All Crowns Maintained.
03:04
Click Next to set the offset parameters.
03:08
If you want the offset roads to follow existing alignments,
03:12
you can specify them here.
03:14
In this case, skip this step.
03:16
Click Next to choose the assemblies to apply.
03:20
If you previously created assemblies for that intersection, you can use those,
03:25
or you can use the default assemblies suggested, as in this case.
03:30
Click Create Intersection.
03:33
The wizard closes, and after a moment, the drawing updates to display the intersection.
03:39
If the labels are overlapping, click and drag them out of the way for a better view,
03:44
to ensure that the intersection appears correct.
03:48
Here, you could connect the road on the right to the intersection,
03:52
but leaving a gap will enable a smoother transition between the point codes and daylights
03:57
when creating the surface from both corridors.
04:01
Now you know how to split corridor segments and create intersections in Civil 3D.