Changes in timber haul emissions in the context of shifting forest management and infrastructure

Table 3 Factor and field weights used in the cost-spread function that produced likely haul routes and distances.

Factor	% Influence	Field	Scale Value
Road Type	80	Interstate highway	1
		US highways	3
		State & County highways	5
		Local or rural road, city street	7
		Vehicular trail	12
		Miscellaneous (traffic circle, access ramp, etc.)	20
		Private drives or foot trails	30
		No coded road	400
Slope	20	0-10%	1
		10-20%	5
		20-30%	10
		30-40%	15
		40-50%	20
		50-60%	30
		60-70%	40
		70-80%	50
		80+%	60

Scale values may be thought of as factors used to determine the path of least resistance from each harvest to each mill.

ISSN: 1750-0680