To remove the interfacing from a side of a road, first click the button on the main toolbar and then the button on the Interface Options toolbar.
You will be prompted to select an existing interface from the drawing. As you move the mouse cursor the nearest road interface line is highlighted. Click to select.
The selected interfacing will be removed from the road and the overall design is automatically regenerated accordingly.
(Note: The Undo option may be used to restore the design, if you need to.)
Whereas the Create Interfacing facility does both sides of the road by default, the Delete Interfacing function removes from only one side at a time.