[Talk-gb-midanglia] A131 + Sudbury

[Tom Sutch]

David Earl <david at frankieandshadow.com> wrote:
 
> simondaw at gmail.com wrote:
...
> > Because of this I checked the Highways Agency
> > website, and sure enough it's not listed as part of the trunk roads
> > network (see http://www.highways.gov.uk/aboutus/6151.htm).
> > 
> > Is there any reason why I shouldn't change its status from "trunk"
> > to "primary"? This seems correct, but it's a big change to make.
> > Also, I notice that the OS map shows the route in green, which may
> > be how it's come to be categorised as "trunk" in the first place.
> 
> I think you need to look at the signs on the ground. If they are
> green, leave it at trunk, if they are black on white, change it.
> 
> The legal status isn't the issue, it's the observed status that
> counts.

To add to what David has said, the definitions of trunk and primary in
the 'real world' do not, unfortunately, correspond to the
conventions in OSM.  However, the way OSM does it makes it much easier
to determine from the signs on the 'ground' -- assuming they're not
wrong, of course!

Term          'Real world'             OSM
------------  -----------------------  ----------------------------

Trunk         Strategic route network  An 'A' road with green signs
              managed by HA            

              Can be motorway or 'A'
              road (used to appear as
              (T) on OS maps)

Primary       An 'A' road with green   An 'A' road with white signs
              signs             

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