I suspect that part of the border line is based on rather old and
generalised information, most likely traced from the old "NPE" maps.
When I look at the recent boundary information from OS Boundary Line the
border is clearly to the east of the road, which would explain why the
road markings are bilingual. 

I will update the boundary in OSM when I get a minute. 

Colin 

On 2014-02-27 19:19, Philip Barnes wrote: 

> On Thu, 2014-02-27 at 10:28 -0600, John F. Eldredge wrote:
> 
>> Part of the border of Davidson County in Tennessee, USA runs down the 
>> centerline of a road.
> 
> The village of Llanymynech straddles the England (Shropshire)/Wales
> (Powis) border, the border runs up the middle of the main street (A483)
> 
> http://www.openstreetmap.org/#map=16/52.7811/-3.0902 [1]
> 
> The bi-lingual Slow/Araf markers painted on the road suggest that Powis
> look after it.
> 
> Phil (trigpoint) 
> 
> _______________________________________________
> talk mailing list
> talk@openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk [2]
 

Links:
------
[1] http://www.openstreetmap.org/#map=16/52.7811/-3.0902
[2] https://lists.openstreetmap.org/listinfo/talk
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