To Edit Offset Alignments in Junctions

You may need to edit offset alignments after a junction is created. You can change the offset value, or select a different alignment to use as the offset.

For example, you can use the Edit Offsets command on an existing junction object to change the parametric value of the junction, or you can select a different offset alignment, using one from the current drawing. You can also grip edit the dynamic offset alignment after it is created.

It is also possible to edit offsets for incoming and outgoing roads by editing the corridor parameters, although this is not typically the preferred method. For example, the offsets can be changed by overriding offsets at one or more chainages, or by overriding target parameters for incoming and outgoing lanes.

To edit offset alignments using the Edit Offsets command

This procedure describes how to widen a road by editing the offset alignment definition on an existing junction object.

1. Do one of the following:
   • In the drawing, click the junction object. On the ribbon, click Edit Offsets Find on the Modify panel of the Junction contextual tab.
   • In the drawing, right-click the junction object, and then select Edit Offset Parameters from the object context menu.
   • In Prospector, expand the Junctions collection, right-click the junction object, and then select Edit Offset Parameters from the Toolspace context menu.
2. On the Junction Offset Parameters dialog box, expand the collection for the alignment you want to edit.

   Notice that when the Use An Existing Alignment property is set to No, the Alignment Name property is read only. Notice also how the Offset Value property is set, and that it is currently editable.

3. Set the Use An Existing Alignment property to Yes, and notice that the Alignment Name property becomes editable.
4. Click to select another alignment from the current drawing.

   Notice that the Offset Value is set to *Varies* if the alignment is not a dynamic offset alignment based on a centerline. Otherwise, the Offset Value specifies the offset value of the attached dynamic alignment. This control is disabled (read only) in both cases.

   Note: If you select another alignment in the Alignment Name field, the original offset alignment that was created during junction object creation is not deleted.

To edit offset alignments using grips

This procedure describes how to widen a road by grip editing the offset alignment that is controlling a junction.

1. In the drawing, select the desired offset alignment in the junction object.
2. On the offset alignment, click and drag the Change Offset (triangle grip) to specify the new offset value. Notice that the junction object and the associated corner radius update.