On May 11, 2012 2:41 PM, "John F. Eldredge" <[email protected]> wrote: > > Paul Johnson <[email protected]> wrote: > > > On Fri, May 11, 2012 at 1:23 PM, Martijn van Exel <[email protected]> wrote: > > > Hi, > > > > > > Two-lane expressways. I came across one of these when running an > > > analysis on OSM data in Vermont, USA. I didn't even know they > > existed. > > > https://en.wikipedia.org/wiki/Two-lane_expressway#United_States > > > The one I looked at is tagged as motorway: > > > http://osm.org/go/ZfEWG3GI-- > > > http://osm.org/go/ZfUQxspO > > > That feels right to me. Is it the convention to tag them as > > highway=motorway? > > > > I'd be strongly inclined to tag it as a trunk since it's not divided, > > and especially since it's fairly short, terminating in more trunks. > > Trunks can have motorway-like features, but I'm inclined to consider > > motorways with only one physical way and/or intersections as trunk. > > > > Major road repairs, such as repairing a bridge, or a point where a landslide has blocked one side of a motorway, sometimes require changing a section of the other side of the motorway into two-way traffic. Generally, a temporary concrete barrier will be erected to separate the two traffic flows, but I have seen emergency situations where the only separation was a row of reflector cones. In such a situation, would you recommend retagging that portion of the motorway as trunk instead of motorway?
No, because that's a temporary situation. There are a few limited two-way one-road motorways, though construction and emergency situations are a poor example. A better example would be the Golden Gate Bridge or BC 7 at certain bridges that have lane control signals and aren't completely reversible.
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