Before You Begin

Creating a Simple 2D Intersection

The simplest way to create a basic two-dimensional intersection object is to start with two alignments that intersect each other only once. You cannot use the Create Intersection wizard if the alignments do not intersect.

If your drawing has two intersecting alignments that meet this criteria, you can create a basic 2D intersection object using the Create Intersection wizard. Simply start the command, follow the prompts, and accept the default choices on the wizard dialog boxes.

Creating a 3D Intersection with Corridor Objects, Alignments, and Profiles

To create a 3D intersection that includes a corridor, you will need to first create the road geometry (road centerline alignments and profiles) and existing ground surface in your drawing. Once these components exist in the drawing, you can proceed with using the Create Intersection wizard. The wizard prompts you to select the location in the drawing where the two road centerline alignments intersect.

You can start with the following data combinations:

• two intersecting centerline alignments
• two intersecting centerline alignments with one or more road edge offset alignments and or their profiles

You can have profiles defined already, or not. However, if profiles are not available, then features that are associated with 3D modeling will not be available on the wizard. For example, if you begin creating an intersection object with no profiles, then the following wizard options will not be available for selection: creating offset alignment and curb return profiles, as well as the ability to create a new corridor, or to add to an existing corridor in the intersection area.

With any of the scenarios just described, you can start the Create Intersection command, select the point where the centerline alignments intersect, and proceed with creating an intersection using the Create Intersection wizard.