In this exercise, you will define the first alignment from the red alignment polyline.
On the Alignments menu, click Define from Polyline.
Select a point on the polyline.
A red X appears at the starting point of the polyline.
Press ENTER to accept the starting point as the alignment reference point and to display the Define Alignment dialog box.
Enter A1 for the Alignment name and Alignment #1 - Seguin Trail for the Description.
Accept the Starting station of 0.000, and then click OK to continue.
The first alignment is defined from a polyline. Data for the new alignment is displayed on the command line including the alignment description, name, number, length, and starting and ending stations.
Click here to see an illustration of the A1 alignment.
If the alignment contains spirals it must be defined from entities, rather than defined from a polyline.