Intermodal bulk transport and non-roads

Some management areas use barges, trains or helicopters to transport wood for part of the delivery. These forms of delivery are different in that wood is transported from one depot to another. Wood hauled by barge or train if often loaded at the starting point and unloaded at the terminus with no options for intermediate stops. The road network segments that are used to represent these carriers "pass over" other road segments without having intersections.

Helicopter logging often has a direct flight path from a landing within a block to the yarding area where the logs are dropped. This can be represented with flight lines radiating out to pickup locations from the yarding area. The yarding area may be connected to the conventional road network for truck delivery to the ultimate destination.