Intersections are haul routes between a road line/area location to another.
Create new intersection in Mass Haul view by right clicking on "Locations" in the project explorer panel on the right. New intersection can also be inserted by navigating to "Insert" tab and clicking "Intersection".
Define intersection properties by editing name, set from location and/or to location and define whether your intersection allows two-way traffic. Length is the distance that is added to hauls that use this intersection. You can also set intersection to be visible in map view.
Intersections are visible in the top panel according to location in Mass haul view. Location colors and data are shown in the intersection rectangle: