First, with respect to corridor design and major transportation corridors, obviously, there are biological specialists in all of these areas.
Let's take a species, such as the grizzly bear. Once you start getting over 0.6 kilometres per kilometres squared of road density, you are going to have some very significant impacts on that species. While, of course, in an extreme circumstance, you're going to want to be assisting that species in crossing the highway, so to speak—and there are best practices with respect to that—really, I think the broader message is that we need large, interconnected, protected areas and management of the matrix in a way that maintains its porosity so as to maintain these species.
There are many specialists. There's lots of good literature about roads.
With respect to the movement of species, again, the implication that needs to be drawn is that we need to expand our protected areas. We need to enlarge them, and this is both in terms of our existing protected areas and in terms of completing the protected area system. We need to expand them northward and upward to maintain the ecosystem representation we have and to allow those species to move in response to changing climatic conditions.