A report compiled by various government and research organizations including the University of Alberta and the BC Ministry of Forests, Lands and Natural Resources, Resource Roads and Grizzly Bears seeks to pull together the information contained in various scientific literature on the relationship between grizzly bears, human motorized access and efficacy of motorized access control as a tool to benefit bear conservation in western Canada. Resource roads are increasing in BC at a rate of 10,000 km of new roads per year, but no data are collected on the rate roads become unusable, either through natural processes or deactivation.

There are generally two mechanisms of grizzly bear response to motorized access: 1) increased human-caused mortality of bears and 2) reduced habitat effectiveness either through displacement or direct
habitat loss. Female grizzly bear survival has the greatest influence on population trend but is reduced in habitats with higher road densities and human use, creating a situation where roads could limit
grizzly bear populations.

(PDF) Resource Roads and Grizzly Bears in…. Available from: https://www.researchgate.net/publication/326446743_Resource_Roads_and_Grizzly_Bears_in_British_Columbia_and_Alberta_Canada?showFulltext=1&linkId=5b4e01c245851507a7a97bba [accessed Jul 25 2018].