Here is my two cents worth from a local SK’er. We never call a highway a Freeway. It’s always a highway, even if it’s divided. No on here ever calls it a freeway.
From my experience anything other than a major highway like 16 or 11 is generally referred to as a secondary highway. In most cases those secondary highways only serve to get to small towns or connect between major highways.
Secondary highways can sometimes be pretty good roads but in recent years most of them are falling into disrepair so stretches of them can go from pavement (broken) to grid and back to pavement.
Call 911 in a rural area can get pretty tricky. In most cases if that happens the cops in that area tend to know the residents and where they live or 911 will fix onto GPS co-ordinates. Otherwise it’s direction given just like mentioned above.
I work in sales and trying to ship things to small communities is a challenge. Most don’t have street addresses. LOL, most of those residents wouldn’t even remember their house number if you asked. They would know their box number though. 