On Mon, Jun 12, 2017 at 1:55 PM, Richard Fairhurst <[email protected]> wrote:
> Kevin Kenny wrote: > > Is there *anyone* that actually can speak to what *is* common > > practice in the US? When I've asked, I've always drawn a lot of > > replies and come away more confused than before. > > I've been doing vast amounts of rural TIGER fixup over the past couple of > years and this is what broadly seems to be what I've seen, bearing in mind > standard practice in other developed countries and the idea that the > highway= tag combines the importance in the highway network with some > assurance of construction quality: > > * highway=motorway: interstate or other long-distance restricted-access > road > * highway=trunk: fast, busy State Highway or US Highway, often NHS/STRAHNET I only saw this since NE2 had mass-upgraded everything in the US highway system to trunk nationwide. Typically, trunk in the US has been meant to mean an expressway, ie, basically a freeway, but it might have intersections (the midwest is full of these, Tesla's first autopilot crash happened on such an expressway). Or it might be fully controlled, but only a single carriageway (Cimarron Turnpike). Or it's dual carriageway, but only one lane on a carriageway (thankfully, this is rare, the only one I remember driving on appears to be 2+2 now). Odd beasts that are more controlled than a primary, yet, not a freeway.
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