To Create a Junction

1. Click Home tab Create Design panel Junctions drop-down Create Junction Find.

   You are prompted to pick a junction 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 junction, 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 junction, 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) junction, then the alignment that passes through the junction 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 junction object creation (on the Geometry Details page of the Create Junction wizard).

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

   An illustration at the bottom of the wizard dialog box provides a conceptual graphic of the gradient 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 junction 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 corner radius for the junction	Place or remove the check mark from the appropriate box on this wizard dialog box.
   Change parameters for the offset alignments, corner radius, lane crossfalls, corner radius 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 junction 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 junction is highlighted in the conceptual graphic.
12. Click Create Junction.