We see them all the time while up north, the reason I have split vision, the reason I'm anti-cross-eyed, to keep an eye on each side of the road. It's not just your headlights, they can be a daytime issue. Last year we had one run in front of us.
As a result we rarely drive at night in Newfoundland. Newfoundland in recent years has become proactive in recent years in high density traffic and high density moose areas. Leaving the ferry at Port aux Basque they have a moose fence for probably 50 miles to keep them off the highway. Between Gander and Grand Falls they have a section with moose radar that produces an alarm when moose are head towards the road.
As we drive further up the West coast there are no such protections. We have seen both Moose and Caribou in the road. Once off the Trans-Canada you will be driving slower, not because of traffic, there is little, but due to the twisty road, the hills and the simple desire to just stop and look.
I remember Newfoundland's first Moose protection device, a sign as you enter Gros Morne Provincial Park stating the number of Moose Accidents. Every year there are 6-800 Moose accidents in NL.
If someone flashes you lights
it's not a radar trap but a moose alert.
Mostly you have to stay alert.