[Tagging] Two lane expressways

Martijn van Exel m at rtijn.org
Fri May 11 21:55:07 BST 2012

On Fri, May 11, 2012 at 2:37 PM, Nathan Edgars II <neroute2 at gmail.com> wrote:
> 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.

That's a good point. I can use that convention to improve my query.

martijn van exel

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