[Talk-GB] A14 primary road

[David Earl]

> -----Original Message-----
> From: talk-gb-bounces at openstreetmap.org
> [mailto:talk-gb-bounces at openstreetmap.org]On Behalf Of Nick Whitelegg
> Sent: 04 January 2007 11:45
> To: talk-gb at openstreetmap.org
> Subject: Re: [Talk-GB] A14 primary road
>
>
> On Thursday 04 Jan 2007 09:48, Richard Fairhurst wrote:
> > Andy wrote:
> > > Unless I can show otherwise I still mainly tag two digit A
> roads as trunk
> > > and the others as primary. With detrunking our maps are going
> to look a
> > > bit dull if we make too many of them simply primary
> >
> > That's only because our renderers put primary in the wrong
> colour, though.
> > :)
> >
> > cheers
> > Richard
>
> Yes, I've always wondered why that is :-)
> I think one of the mapnik maps, or one of the osmarender maps,
> puts it the
> "right" way round though (I forget which)
>
> Maybe an easy solution to the "which is primary, which is trunk"
> question is
> to decide based on the colour of the road signs (white or green)
> as that is
> an easily-defined thing.

That's absoltely the right thing to do - in the UK if it has a green sign,
it should be highway=trunk, otherwise the rendering doesn't correspond with
the on-the-ground perception or any other road map, all of which follow this
coluring convention.

The real definition of 'trunk' is those roads which the Department for
Transport have responsibility for (rather than the local authority), and as
Richard said, this is different. The A33 is indeed primary by that
definition (but the A14 isn't). But that's not helpful, so please, let's
stick to the green sign=trunk, other A road = primary, B numbered road =
secondary (and blue sign = motorway, of course).

David