One of the problems is that so much is car-centric.
During my recent trip north, I had a blowout in Jefferson, and nursed my booted tire to the nearest bike shop in Salem, about 20 miles further north. So, I tried to follow the most direct route there. Unfortunately, all the signs routing me to Salem wanted me to hop onto the Freeway. Fortunately I was able to find Frontage roads until I skirted around the Freeway ramps onto Commercial Avenue which I followed into the City. Anyway, I did consider the Freeway if I had actually needed it.
There appears to be quite a bit of debris on the shoulder above. Not my favorite place to be, but I'd have positioned myself as far right as possible on the shoulder.