At the time the caches were placed, the road was family-car friendly. All caches are regular sized, winter friendly containers.
The road does NOT come out on the other end, unless you are driving an ATV. I made the mistake of saying "let's see where this goes" and needed to back out because it deteriated quickly.
I ran out of caches before I ran out of room to place them along this road. There is a turn around spot at the end of the road, but the trees close in a bit before you get to it.