[Talk-GB] Primary or Trunk?

[Robert Norris]

>
> Sorry if I've not seen the old posts on this, the wiki pages are
> contradictory which is why I asked the question.
>
> In the UK we are defining Trunk or Primary based on some arbitrary
> definition not on anything that is of use to any user or renderer.
>
> What we should be mapping is reality, so that people can use that data
> to build on. Whether a road is signed in Green, Pink or Purple tells a
> user nothing, it may have a legal definition but that is all. The tag
> we give it should tell the user something about the road's capabilities,
> importance, size and potential timings/traffic flow. A Trunk road that
> is a dual carriageway with a maxspeed of 70 mph is very different to a
> Trunk road that winds around fields and has a maxspeed of 50 mph or less!

Other tags such as lanes=*, width=*, surface=*, maxspeed=* etc... are for more the detailed nuances of route calculations based on the physical properties of the road. Or for how a renderer could choose to emphasize certain roads over others.

Of course the bendyness of the road should be interfered from the geometry of the node positions themselves.

HTH.