A true "super two" freeway, with no at-grade intersections whatsoever, would be properly classified as a motorway under global OSM tagging conventions. These may not be particularly common in the U.S. (although they exist), but they are common enough around the world to be consistent.
Sorta-I-93 through Franconia Notch would not technically be a super two due to the median barrier; it's two separate one-lane motorway carriageways under OSM tagging conventions. IMO the first criterion I'd look for is: does this road carry the same restrictions associated with a freeway in the state in question? For example, in many states, freeways have posted access restriction signs limiting use by pedestrians, bikes, low-cc motorized vehicles, and sometimes farm equipment. If it does, it's a motorway, at least where those restrictions apply. If it doesn't, it's not. If that fails, what is the official stance of the operator of the route? If it has full access control, it's a motorway. If not, it's not one. This is where referring to an official state highway map would potentially be helpful. Then you've got the headscratchers, like US 27/280 southeast of Columbus, Georgia, which has no at-grade access for miles because of post-9/11 security enhancements at Fort Benning, but I don't think technically is considered by GDOT to be a freeway and isn't posted as one, even though I'm sure any pedestrian or cyclist using it would enjoy a long conversation with some friendly military police officers. Someone (no idea who) upgraded it to freeway. Chris -- Chris Lawrence <lordsu...@gmail.com> Website: http://www.cnlawrence.com/ _______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us