I've long appreciated the distinction that Chuck Marohn has been making between roads and streets, and I'm glad he's added country roads to the mix. Chuck has pointed out the problems that arise when we try to treat streets or country roads like highways, and when we try to treat highways like streets. A lot of that, and a whole lot more problems, come from the vehicles we use to navigate those different ways, specifically from trying to use road vehicles on streets and country roads, and vice versa.
As Chuck says, a road is for long-distance travel, and it functions most efficiently at maximum speed with the minimum number of intersections. A street is a place for commerce and other social activity, including local travel, and it functions best at low speeds with lots of connections to other streets and spaces. A country road is for medium-distance travel, and it functions best when no one is trying to use it as a highway or street.
The most efficient vehicles for moving things on highways are trucks, and the bigger and faster, the better. The most efficient vehicles for moving people on highways are "over the road" buses, the high floor kind with one door at the front. If you don't care about the costs to yourself or others, a sports car is the most effective way to move people (yourself and maybe one other person).
The most efficient way to move things in streets are the various slow-moving human-powered strategies: backpacks, pushcarts, hydraulic-assisted forklifts. Which strategy depends on the size of the things. The best way to move people in streets is on foot or wheelchair.
The best way to move things or people on a country road is a pickup truck.
A lot of the problems we have on streets (as in places for social activity) come from people using trucks, sports cars and big buses on them. They are big, heavy and hard to maneuver, and we wind up killing people when we try. People have tried various strategies to compensate for this, but none have worked very well.