Regarding state highways: I'm aware that many states have sort of ridiculous state highway systems. That's the purpose of the "Note" at the end of the Minor Highway section. Louisiana's highway system is ridiculous. At least you guys have the >400-series / secondary routes distinctions there; ours are assigned sequentially so the number is, functionally, almost useless. At least most of the 0.05 mile state highways were finally removed in 2010. Anyway, I will include in the note a link to the state mapping resources pages, and each state mapping resources page should if necessary include a rule about secondary state highways.
Regarding County Routes, the Primary Street section does say that "Some states designate county routes" (emphasis added). The rule is there for the states that do.
Regarding adding numbered routes in general, I find it adds quite a lot to rural areas where functional class is of limited help. Of course it depends on the state, but for sake of example, look at the LA functional class state map (large file ~10MB); some areas around Bienville, Jackson, Ouachita, and Winn Parishes, and the Gulf Coast in Cameron Parish in the southwest corner; are 30-40 miles from the nearest Arterial. Instead of one taking precedence over the other, whichever is higher takes precedence instead — Waze can use traffic data to discount a higher-type road, but not to count a pruned lower-type road.
Regarding County Routes, the Primary Street section does say that "Some states designate county routes" (emphasis added). The rule is there for the states that do.
Regarding adding numbered routes in general, I find it adds quite a lot to rural areas where functional class is of limited help. Of course it depends on the state, but for sake of example, look at the LA functional class state map (large file ~10MB); some areas around Bienville, Jackson, Ouachita, and Winn Parishes, and the Gulf Coast in Cameron Parish in the southwest corner; are 30-40 miles from the nearest Arterial. Instead of one taking precedence over the other, whichever is higher takes precedence instead — Waze can use traffic data to discount a higher-type road, but not to count a pruned lower-type road.
Re: Road Types (USA) – comprehensive overhaul of drivable ro