About Creating Alignments
Create alignments in many ways using Autodesk Civil 3D, such as creating them from objects, and using the Alignment Layout Tools.
About Creating an Alignment by Best Fit
Create an alignment that follows the most logical path through a series of feature lines, COGO points, or AutoCAD lines, arcs, points, or blocks.
About Creating Connected Alignments
You can use the connected alignments feature to create an alignment that transitions between two intersecting alignments and to create a profile that transitions between their profiles.