Roads meeting other classified roads with the same number

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Owain
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Re: Roads meeting other classified roads with the same number

Post by Owain » Thu Jul 12, 2018 17:46

c2R wrote:
Fri Mar 02, 2018 14:28
Are there any others that I've missed in this category:

Category:Roads which meet another road of the same number but different classification
You can add the A7 and B7 (Northern Ireland) to your list; they meet at Crossgar.
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Re: Roads meeting other classified roads with the same number

Post by c2R » Thu Jul 12, 2018 18:26

Owain wrote:
Thu Jul 12, 2018 17:46
c2R wrote:
Fri Mar 02, 2018 14:28
Are there any others that I've missed in this category:

Category:Roads which meet another road of the same number but different classification
You can add the A7 and B7 (Northern Ireland) to your list; they meet at Crossgar.
Done - cheers for that.
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Re: Roads meeting other classified roads with the same number

Post by Euan » Sat Jul 14, 2018 11:25

The C9 in the Falkirk council area falls into this category as it meets the A9 between Larbert and Bannockburn. It is also worth noting that this number is retained as the road continues into the Stirling council area to meet the A872 near Stirling Services, but the two segments of the C9 are separate entries on the wiki due to the different local authorities. Assuming suffixed road numbers can be accepted, the C97S meets the A97 between Huntly and Aberchirder acting as a link to the B9001 nearby. So the Falkirk C9 and the Aberdeenshire C97S can be added to the category.
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Re: Roads meeting other classified roads with the same number

Post by Euan » Sat Nov 03, 2018 09:28

The C12 in Northern Ireland crosses the B12 along the stretch between Aghalee and Glenavy:

https://www.sabre-roads.org.uk/wiki/ind ... n_Ireland)
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From the SABRE Wiki: C12 %28Northern Ireland%29 :


The C12 commences on the A26 and briefly follows the latter's former alignment southwards into Ballinderry. Before long however, there is a TOTSO and the road turns off to the right heading north west. The road is generally straight as it makes its way through the fairly flat and lowland landscape with only a couple of serious bends close to where it approaches the B12 at a crossroads. After the crossroads, the road is slightly

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Re: Roads meeting other classified roads with the same number

Post by Robert Kilcoyne » Sat Nov 03, 2018 12:51

The A5284 meets the B5284 at the Plumgarths roundabout northwest of Kendal.

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Re: Roads meeting other classified roads with the same number

Post by Euan » Sat Nov 03, 2018 17:07

The case of the A5284 and B5284 definitely seems to be a deliberate one as the "5284" does form a roughly continuous route. The A4289/B4289 and A76/B76 (NI) also seem to follow a similar combined route.

As there are generally more B roads than A roads, like-numbers will slowly diverge away from each other geographically when moving outward from the hub and so unintentional meetings of the same road of a different class are more likely to occur closer to the road hub of the numbering zone concerned.

Take zone 8 for example: the A803 and B803 meet each other in Falkirk relatively near the start of the zone from the Edinburgh hub, but by the time you have reached the Outer Hebrides you are sitting on A859 on one scale and B898 (not Strathtay, the original one!) on the other.

However with the addition of new numbers, rerouting and renumbering right from the very start of the system there are many cases where this principle is no longer relevant and so it is still perfectly possible to find a pair of different classes of road with the same number hundreds of miles away from the zone's hub. This does of course only apply for A and B roads meeting each other, with other factors to consider for motorways and C roads.
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Re: Roads meeting other classified roads with the same number

Post by Robert Kilcoyne » Sat Nov 03, 2018 19:07

Euan wrote:
Sat Nov 03, 2018 17:07
The case of the A5284 and B5284 definitely seems to be a deliberate one as the "5284" does form a roughly continuous route.
It appears that the A5284 (former A591) was originally numbered as the B5284 but it was recognised very quickly that the road from the A591 into Kendal had to be A class, and in more recent years, the A5284 is used by many drivers coming up from the south as a means of accessing the A6 towards Shap, the A685 and A684 without having to negotiate the narrow streets and one-way system in Kendal town centre. The signage on the A591/A6 multiplex south of Kendal encourages traffic heading for Shap, Brough and Sedbergh to continue on the A591 up to the Plumgarths roundabout before turning right to join the A5284.

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Re: Roads meeting other classified roads with the same number

Post by Euan » Thu Nov 08, 2018 21:22

Another one from Northern Ireland: the A26 and the C26.

See here:
https://www.sabre-roads.org.uk/wiki/ind ... n_Ireland)

I may well find more of these while adding the NI class III roads to the wiki, but the B numbers run out a bit after 200, except for a few predominantly urban-based routes in the lower 500s. There are also some three-digit urban A roads with numbers just over 500. So therefore any other cases will most likely be found before ~C200, but there is a chance that I could find a case just after ~C500. However the C road numbers may be ordered by county and the C5xx range may not be found anywhere near Belfast or Derry, but you never know. So far it seems to be that the two-digit C roads are based primarily in County Antrim, but no doubt as I continue I will be able to detect further patterns in the other counties.
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From the SABRE Wiki: C26 %28Northern Ireland%29 :


The C26 is a rather lengthy C road which starts on the six-way Nutts Corner Roundabout on the A26 in south County Antrim. From here it heads north east to meet the B39 along the "Seven Mile Straight" just south east of Loanends. The road resumes from a junction just along the road and continues to meander in a generally north eastward direction. Along the way it crosses the C27 at a slightly

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Re: Roads meeting other classified roads with the same number

Post by nick_dunn » Sun Oct 20, 2019 12:32

A5120 meets B5120 at M1/J12.

(I tried to edit the page myself but perhaps I don't have permissions? I get a heading with [[Category:Miscellaneous information]] but no details underneath).

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Re: Roads meeting other classified roads with the same number

Post by Steven » Sun Oct 20, 2019 13:51

nick_dunn wrote:
Sun Oct 20, 2019 12:32
A5120 meets B5120 at M1/J12.

(I tried to edit the page myself but perhaps I don't have permissions? I get a heading with [[Category:Miscellaneous information]] but no details underneath).
No, you do have permissions to do things on there, it's just that the category page is automatically populated from the individual pages.

To fix this, you need to add

Code: Select all

[[Category:Roads which meet another road of the same number but different classification]]
right at the end of each road page.
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Re: Roads meeting other classified roads with the same number

Post by Al__S » Sun Oct 20, 2019 19:53

ForestChav wrote:
Sun Mar 04, 2018 21:27


The Scottish ones are effectively Ax(M)s in that they replace the A-road whose corridor they take, so this point will always apply to them.
Not quite true? The A9 and M9 have a junction at J5, and the A9 and M9 then both run to the Keir Roundabout for their second junction, so they don't meet end-on in the manner that an Ax(M) will always meet it's Ax. The A8 has various sections, some of which run roughly parallel to the M8- again, the M8 and A8 never meet end-on (as in, the end of both roads). The M74, M77, M80 and arguably the M90 as well

The A73 never meets the M73 at all- and the A74(M) never meets the A74.

In fact, of the Scottish motorways, only the M876, M898 and A823(M) that meet their Ax versions end on

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Re: Roads meeting other classified roads with the same number

Post by orudge » Mon Oct 21, 2019 16:34

Al__S wrote:
Sun Oct 20, 2019 19:53
Not quite true? The A9 and M9 have a junction at J5, and the A9 and M9 then both run to the Keir Roundabout for their second junction, so they don't meet end-on in the manner that an Ax(M) will always meet it's Ax. The A8 has various sections, some of which run roughly parallel to the M8- again, the M8 and A8 never meet end-on (as in, the end of both roads). The M74, M77, M80 and arguably the M90 as well
That said, the M8 does meet the A8 end-on (but you can also choose to continue along the A8 rather than the M8 if you're heading from Greenock), and the same with the M9/A9 south of Dunblane.

While historically the M90 Dundee route was the M85, it is the mainline coming from Edinburgh so I'd argue it is indeed the "main" route rather than the Perth spur. From that point of view, 3 of the 5 ends of the M90 do meet the A90 (junction 11, junction 1A, junction 1).
Al__S wrote:
Sun Oct 20, 2019 19:53
The A73 never meets the M73 at all- and the A74(M) never meets the A74.
The A74 and the M74 do meet of course, but it's not the end of either road.

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Re: Roads meeting other classified roads with the same number

Post by Richard_Fairhurst » Tue Oct 22, 2019 13:47

Ok, so I cheated a bit...

osm=# select distinct a.ref from planet_osm_line a join planet_osm_line b on st_dwithin(a.way,b.way,1) where a.britain and b.britain and a.ref is not null and b.ref is not null and a.ref like 'A%' and b.ref like 'B%' and a.ref=replace(b.ref,'B','A') order by a.ref;

ref
-------
A
A105
A1101
A1120
A25
A300
A3013
A4289
A45
A5120
A5137
A5207
A6007
A7
A700
A701
A803
A814
A908
(19 rows)


(The A5207 looks like a mapping error, though.)
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Re: Roads meeting other classified roads with the same number

Post by Tater » Fri Nov 08, 2019 22:01

M180 and A180 meet end on near Humberside Airport
MOTORWAYS TRAVELLED: M1, M3, M4, M5, M6, M18, M25, M27, M40, M42, M50, M60, M62, M180, A1(M), A3(M), A66(M), A167(M), A194(M)
A F99 TRAVELLED: A1, A3, A15, A16, A17, A18, A19, A27, A30, A39, A40, A41, A46, A47, A52, A57, A61, A62, A63, A64, A66, A67, A68, A69, A90

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