Technical information

Working with Alignments | 89
Key Concepts
■ The Horizontal Alignment Editor is linked dynamically to the drawing.
Changes that you make in the Editor update the alignment automatically
in the drawing.
■ You can use the Horizontal Alignment Editor to modify PIs (Points of
Intersection) and alignment curves and spirals.
■ The editor is similar to a spreadsheet. You must select inside the cell that
you want to modify.
■ To change the alignment properties, such as the alignment layer, color,
linetype, or description, use the Modify Properties command from the
Alignments ➤ Alignment Commands menu.
Drafting Road Results
As you create a base map, you can complete a final drafting of an alignment
by adding roadway offsets, roadway stationing, and station and offset spot
labels.
You can also use the AutoCAD Map 3D commands to create a network topol-
ogy of the alignments from which you can calculate the shortest paths to
destinations, or show graphically the traffic volumes that travel along each
alignment.
To edit a road alignment
Steps
Use to locate
1 Select the current alignment. Making an Alignment
Current
2 From the Alignments menu, choose Edit to display the
Horizontal Alignment Editor dialog box.
Editing Horizontal
Alignments
3 To edit a curve, place the cursor in a cell at a curve point
of intersection (PI), and then click Edit Curve.
Editing a Horizontal
Alignment Curve
4 To edit a spiral, place the cursor in a cell at a spiral point
of intersection, and then click Edit Spiral.
Editing a Horizontal
Alignment Spiral
5 After you have finished editing, click OK to save all
changes in the database and update the graphics.