[Tagging] Two lane expressways

[Nathan Edgars II]

On 5/11/2012 4:23 PM, Martijn van Exel 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?
>
> Reason is I am running an analysis to detect trouble with the main
> road network. One trouble flag is highway=motorway without oneway tag,
> but that would flag this road here and it's perfectly OK.

Since oneway=yes is the default for motorways (per the wiki, and 
apparently some routers), these should be tagged as oneway=no (as these 
two in fact are).

It's somewhat more common to have a two-way motorway_link, which should 
also be tagged oneway=no.