[Talk-GB] "Trunk" vs "green-sign" routes in the UK

Richard Mann richard.mann.westoxford at gmail.com
Mon Apr 22 13:55:40 UTC 2013


the wiki is the long-accepted approach: use highway=trunk for green signs -
ie the primary (sorry) route network


On Mon, Apr 22, 2013 at 2:44 PM, David Fisher <djfisher81 at gmail.com> wrote:

> Hi,
>
> This is kind of a tagging question, but is UK-specific and pretty
> straightforward so I thought I'd post it here -- apologies & happy to
> re-post if felt inappropriate.
>
> I've noticed a couple of roads in the UK being downgraded in OSM from
> "trunk" to "primary" on the basis that they are not "trunk" in the County
> Council / DfT maintenance sense.  They are, however, "green-sign" primary
> routes and are clearly of greater importance than your average "white-sign"
> route.  The ones I've noticed are the A354 (Salisbury-Blandford) and A22
> (Greater London boundary to E Grinstead).
>
> Strictly speaking these changes are correct, as "trunk" in the UK implies
> being run by the DfT rather than local councils (N.B. a large number of
> former trunk routes have been devolved in the past 10 or 20 years).  But
> the OSM Wiki says to use the "trunk" tag for "primary A road (green
> signs)", and this would certainly make more sense from the road-user
> perspective.  Is there a consensus on this?  If not, might it be a good
> idea to introduce a new tag signifying a UK "green-sign" route, and for
> these to be rendered as such in Mapnik (i.e. in green, the same as "trunk"
> routes)?
>
> Thanks,
>
> David.
>
>
>
>
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