Google maps shows U.S. 95 with a good shoulder. However, there is lot of four-lane divided highway, and you can see some traffic in places. The thing about Google Street View is that you don't know if the footage is representative of the norm. It could have been taken "off season" or at a non-peak hour. If the footage is representative of the norm, it doesn't look that unpleasant or dangerous, at least south of town. In town, there is a lot of traffic.
From experience, I would not try to ride it into and out of Sandoint if you plan to go that far north. U.S. 95 was very busy when I was there back in '00. There was a path parallel to the road that took you across the lake and into town via the old highway bridge.