Hello, Northshore Road should not be a primary road. Some years ago, I upgraded it to primary for the sake of connectivity, but more recently downgraded it back to secondary as it does not serve as a primary road in the scheme of travel. It is a major roadway in a sense, being the main highway in and out of the Lake Mead NRA, but its traffic counts are extremely low for most of the road, no populated places are directly linked aside from the sporadic mobile home parks along the shoreline, and with the roads being tolled (or requiring a National Park pass), there is likely little to no traffic here using these roads as through roads for travelling between, say, Moapa Valley and Boulder City, but rather sees its usage from visitors and residents.