On 12/08/2019 19:06, Paul Allen wrote:
On Mon, 12 Aug 2019 at 18:25, Fernando Trebien
<fernando.treb...@gmail.com <mailto:fernando.treb...@gmail.com>> wrote:
There are all sorts of opinions on this matter, but trying to define
classification rules based on physical characteristics or
administrative responsibility (municipality, state or national) always
led to unexpected situations here. I guess the UK is somewhat unique
in having an official classification system that matches the
topological organization of the road system.
I would hope the UK is not unique. The reason it matches (mostly) in
the UK is that
the classification was assigned based on the characteristics of the
roads. It
wasn't somebody making decisions based upon a whim, it tried to assign
categories based upon usage: it defined a route as being primary if it was
the best route.
The UK is not unique. When I first drove to Paris back in 1981, I went
on the hovercraft to Boulogne and then drove down the N1 to Paris.
It was much like a UK trunk road, mostly two lane, streches of dual
carriageway and it passed through villages and towns along the way. Far
nicer than boring Motorways.
I used that route many times over the years, however France
deccentralised its network and much of this has been lost.
In England/Wales, the road network radiates out from London, with the
single A digit roads leading to the major destinations.
A1 to Edinburgh, A2 to Dover, A3 to Portsmouth, A4 to Bath, A5 to
Holyhead and A6 to Carlilse. The network is divided into zones, hence
most A and B roads between the A5 and A6 (my zone), with start with a 5.
The exceptions will be roads which start in a different zone.
Scotland has a similar systen radiating from Edinburgh.
The term trunk is based on the trunk of a tree, with other roads
branching off.
Phil (trigpoint)
_______________________________________________
Tagging mailing list
Tagging@openstreetmap.org
https://lists.openstreetmap.org/listinfo/tagging
