I think the missing pieces of information is that Wapiti (Cervus canadensis) was until recently classified as a subspecies of Cervus elaphus. I'm guessing that the authors of the paper (and the provincial government) either don't agree with this reclassification, or have some legal reason for continuing to refer to the native North American animals by the older Latin name.
I grew up in Scotland where we have Red Deer. Those animals are roughy the same thing as a North American Elk.
Anyway, I think Volvo addressed this problem by
a) reinforcing particularly the A pillars using some very strong Boron steel alloy:
http://135jik1bbhst1159ri1ax2pj.wpengine.netdna-cdn.com/wp-c...
b) angling the A pillars/front screen more in order to deflect some of the forces caused by a direct collision with a Moose.
Moose are terrifying, since they are often upwards of 1000 pounds, and are tall enough that when you hit them with anything smaller than a full-size pickup or tractor trailer, they tend to fall on the roof and windscreen of the vehicle, crushing them and killing the passengers.