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<div class="moz-cite-prefix">On 12/08/2019 19:06, Paul Allen wrote:<br>
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cite="mid:CAPy1dO+nxFtwnJFWw3=nmUoW3O6ZU1j=cBqG5xiJP_FtpQE9cA@mail.gmail.com">
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<div dir="ltr">On Mon, 12 Aug 2019 at 18:25, Fernando Trebien
<<a href="mailto:fernando.trebien@gmail.com"
moz-do-not-send="true">fernando.trebien@gmail.com</a>>
wrote:<br>
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There are all sorts of opinions on this matter, but trying
to define<br>
classification rules based on physical characteristics or<br>
administrative responsibility (municipality, state or
national) always<br>
led to unexpected situations here. I guess the UK is
somewhat unique<br>
in having an official classification system that matches the<br>
topological organization of the road system.<br>
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<div>I would hope the UK is not unique. The reason it matches
(mostly) in the UK is that</div>
<div>the classification was assigned based on the
characteristics of the roads. It</div>
<div>wasn't somebody making decisions based upon a whim, it
tried to assign</div>
<div>categories based upon usage: it defined a route as being
primary if it was</div>
<div>the best route.</div>
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<p>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.</p>
<p>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.</p>
<p>I used that route many times over the years, however France
deccentralised its network and much of this has been lost.</p>
<p>In England/Wales, the road network radiates out from London, with
the single A digit roads leading to the major destinations. <br>
</p>
<p>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.<br>
</p>
<p>Scotland has a similar systen radiating from Edinburgh.</p>
<p>The term trunk is based on the trunk of a tree, with other roads
branching off.</p>
<p>Phil (trigpoint)<br>
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