To Create an Intersection

1. Click the Home tabCreate Design panelIntersections drop-down Create Intersection Find.

   You are prompted to pick an intersection point in the drawing.

2. In the drawing, click the location in the drawing where two alignments intersect.
   Note: If you wish to create a 3-way intersection, it is important that the alignments meet precisely and do not overlap or undershoot. If the two alignments overlap, a 4-way intersect is created.
3. If you are creating a 4-way intersection, you will be prompted to select the alignment that will be identified as the primary road. If so, select the alignment by clicking the alignment in the drawing, or by pressing Enter and selecting from the list of alignments in the drawing.

   If you are creating a T-shaped (3-way) intersection, then the alignment that passes through the intersection is automatically specified as the primary road (main road). In this situation, you are not prompted to specify which road is the primary road because this happens automatically. It is possible to change the road priority only during intersection object creation (on the Geometry Details page of the Create Intersection wizard).

4. On the General page of the Create Intersection wizard, enter a name for the intersection object, or accept the default. You can also enter an optional description, and change defaults for marker styles, layer, and labels.
5. For the Intersection Corridor Type, select one of the following to specify the corridor grade options through the intersection area:
   • Primary Road Crown Maintained: When this options is selected, the primary road crown is maintained through the intersection.
   • All Crowns Maintained: When this options is selected, the crowns of both roads included in the intersection are maintained through the intersection.

   An illustration at the bottom of the wizard dialog box provides a conceptual graphic of the grade type selected.

6. Click Next to proceed to the next page of the wizard.
7. On the Geometry Details page, you may accept or change the defaults. For example, if desired you can perform the tasks listed in the following table:

   To perform this task...	do this...
   Change the alignment priority	Select an alignment in the list and click the arrows. Note: Once the intersection object is created, you cannot change the value of the road priority for an alignment.
   Select different profiles for the alignments	Select an alignment in the list and click in the Profile cell to select a profile from the drop-down list of available profiles in the current drawing.
   Choose to create or not create offset alignments and curb returns for the intersection	Place or remove the check mark from the appropriate box on this wizard dialog box.
   Change parameters for the offset alignments, curb returns, lane slopes, curb return profiles	Click the appropriate Parameters button on this wizard dialog box.

8. By default, new offset alignment objects will be created. However, if you want to specify an existing offset alignment from the drawing, click the Offset Parameters button, set Use An Existing Alignment to Yes, and select the alignment by clicking next to the Alignment Name property.
9. Click Next to proceed to the next page of the wizard.
10. On the Corridor Regions page, you may accept or change the defaults. For example, if desired you can perform the tasks listed in the following table:

    To perform this task...	do this...
    Create a new corridor in the intersection area	Select the Create a New Corridor option.
    Add to an existing corridor	Select the Add to an Existing Corridor option to add to an existing corridor, and then select an existing corridor using the drop-down list or by picking from the drawing. If you do not have corridor objects in the drawing, this option is not available.
    Select a surface to daylight	If a surface is available in the current drawing, you can select a surface to daylight. However, you cannot target a surface that is an output of another corridor.
    Select an assembly set to import	Click Browse, select the assembly set, then ensure the assembly set is selected using the drop-down arrow under Select Assembly Set To Import.
    Select different assemblies	If the desired assembly objects exist in the current drawing, you can select different assemblies by clicking in the Assembly To Apply column. Otherwise, accept the default assemblies specified.

11. Click the items listed under Corridor Region Section Type, and notice that the conceptual graphics update with each selection. The location where the assembly will be applied along the intersection is highlighted in the conceptual graphic.
12. Click Create Intersection.