almost every Morning, before sunrise, I drive to our other farm. Midway is an acreage with a pair
of , I believe to be Great Pureness. These dogs are often out on the road. In the summer they will
be lying in the roadway. I know they live there, so generally I slow down. 
One of these days I'm afraid when they charge from the drive way or are masked by snow or fog,
there will be a bad outcome. Not only for the dog, but these behemoths could do some serious damage
to a car.
from what I know of the couple that own the dogs, It would get ugly.

Now the question. Do I approach the owners and voice my concern? but this would also put them
on notice that I am aware of the dogs and if a collision were to occur I would hold some responsibility?
Do I contact (anonymously) the sheriff or local humane society?
(I do not want to be a Karen or Ken). 

Or do nothing......let sleeping dogs lie.......so to speak :)