Animal fencing in New Brunswick...

While driving along the Trans Canada highway in New Brunswick, we noticed this fencing, for km's at a time, not knowing why or what for, I have since googled it. Interesting stuff, I read, deathes due to the moose/vehicle accidents are extreme in some areas and this fencing is in place to keep the moose back.
This first pic shows a 'one way gate' whereby I assume if the moose does get through the fencing, it can return through the gate safely.