[Talk-GB] highway=primary cul-de-sac?

[Peter Neale]

Just to say; there are LOTS of single-carriageway A roads in the UK.
Also, I can see that, at the edges of the Primary road network, a junction might have one "primary" road, linked to several (or 2?) tertiary roads.  That would seem logically reasonable to me.  However, I would struggle to understand a "primary" road that is a true cul-de-sac, with no exit, whatever designation the relevant authority migh assign.  
Regards,PeterPan99

    On Saturday, 14 January 2023 at 08:55:57 GMT, Steven Hirschorn <steven.hirschorn at gmail.com> wrote:  
 
 That's the thing - when I imagine an A road I imagine a road with probably two lanes in each direction, and a central reservation, but I know that many don't have those features.
Someone must be able to query OSM for primary roads that reach a node with no further motor vehicles access to see how common it is?!
On Sat, 14 Jan 2023, 07:13 Mateusz Konieczny via Talk-GB, <talk-gb at openstreetmap.org> wrote:

 For me it is definitely not highway=primary, though if it is officially classified
as primary road in official designation data for UK that makes it a bit tricky.

Is it fine, also in UK that gave origin to main highway=* values, to ignore
official road classification where it is silly/outdated?

Poland has relatively highly classified road that is 55m meter long and leads to
an abandoned railway station ( https://www.openstreetmap.org/way/264203873/history )
https://pl.wikipedia.org/wiki/Droga_wojew%C3%B3dzka_nr_219

Also from Poland:

National road 58: https://wiki.openstreetmap.org/wiki/File:Jedwabno.JPG
National road 90 in 2010: https://wiki.openstreetmap.org/wiki/File:Korzeniewo12.JPG
(yes, ferry crossing)
National road 90 in 2013: https://commons.wikimedia.org/wiki/File:Kwidzyn_most.JPG
(rerouted a bit, old ferry was abandoned)
National road 81: https://wiki.openstreetmap.org/wiki/File:Miko%C5%82ow_-_DK81.JPG

Obviously, not all of them are classified in the same way.

(it is explicitly documented at 
https://wiki.openstreetmap.org/wiki/Drogi#Klasyfikacja_dr%C3%B3g as it is common
mistake by newbies to reclassify sandy road across forest because it is officialy
classified as something)

Jan 13, 2023, 23:12 by steven.hirschorn at gmail.com:

I thought this was interesting: I noticed that a couple of mappers have different opinions about whether a road in OSM should be marked as "primary" or "tertiary". The road is still apparently designated the A3000, though Hounslow Council/TfL have also designated it a section of the route of Cycleway C9, and the last 300 metres are now a cul-de-sac (at least for cars travelling westbound, there's a modal filter at the end so pedestrians, cyclists et al can continue onward and there's also the one-way Clarence Road which allows cars to join Wellesley Road eastbound)

So is it still a primary road because of the designation? Can a primary road be a cul-de-sac? Aren't they usually roads designed to be a core route of the road network?

I'd argue that if anything, from a motor vehicle perspective, it's become "residential" rather than "tertiary"...

https://www.openstreetmap.org/changeset/131241784



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