Best answer: How do I extend an existing alignment in Civil 3d?

How do you edit alignment in Civil 3d?

Click Alignment tab Modify panel Geometry Editor . On the Alignment Layout Tools toolbar, click Alignment Grid View. Examine the Alignment Entities table in Panorama. In the first column, alignment segments are numbered in the order in which they are solved.

How do I add a line to an existing alignment in Civil 3d?

To add a fixed line (from curve end, length)

1. Click the alignment. Click Alignment tab Modify panel Geometry Editor Find.
2. On the Alignment Layout Tools toolbar, click Fixed Line (From Curve End, Length).
3. Select an entity end for the start point and direction.
4. Specify the length. A line preview is displayed.

How do you edit alignment?

To launch the Geometry Editor command, you can click the alignment to select it, and then click Geometry Editor on the contextual ribbon that appears because you’ve selected an alignment. When you launch the Geometry Editor tool, it brings up the Alignment Layout Tools tool bar.

How do you change the alignment radius in Civil 3d?

Go to alignment grid view. Find the curve that you need to modify. If the radius is editable edit the radius. If the radius is not editable click the unlock icon on the relevant row to make the radius editable.

How do you add a spiral in Civil 3d?

Click the alignment. Click Alignment tab Modify panel Geometry Editor Find. On the Alignment Layout Tools toolbar, click Free Spiral-Curve-Spiral (Between Two Entities). Select the entity from which you want to add the spiral-curve-spiral.

What is a value in Civil 3d?

Answer. The ‘A’ value of a transition curve defines the ‘flatness’ of the spiral and is expressed as where R = Radius and L = Transition Length.