Talk:Anomalously numbered roads in Great Britain

message: The meaning of "furthest-anticlockwise" needs to be specified more precisely in order to establish the concept of anomalousness. For the M25 the crucial point is that it does not directly pass between zones 1 and 2. If it did so, but instead had a small gap somewhere else, this would not change its list of zones; the order in which they occur is significant. The A202 seems to link zones 2 and 5 without passing through zone 4. On what basis is zone 2 more anticlockwise than zone 5? One answer (which is also consistent with the M25) is that you always start looking from zone 1 and go anticlockwise towards zone 2. On this basis the (unlisted) A202 is indeed not anomalous, but neither is the (listed) A282. The A100, A101 and A102 would become anomalous instead only if the boundary between zones 1 and 2 is taken to be The Thames exactly, rather than the first main road running along its south bank.  —Preceding unsigned comment added by 82.24.163.22 (talk) 00:41, 22 March 2009 (UTC)
replies: text: In England and Wales, "furthest anticlockwise" is precisely defined for a road which is continuous (or whose missing links are so obvious they can be assumed) and does not cross all six zone boundaries.  If the road lies within one zone then the prefix is obvious.  If not then it must cross a set of boundaries which are adjacent on the circular list (1:2, 2:3, 3:4, 4:5, 5:6, 6:1, 1:2, ...), even if the boundaries are multiplexed together or the road crosses them multiple times.  The first number of the first boundary crossed gives the correct prefix.  A similar argument applies for the five boundaries (1:6, 6:7, 7:8, 8:9, 9:1) in Scotland, though there may be a theoretical ambiguity where a road crosses the 1:6 boundary at the border with England.  This analysis, of course, is pure WP:OR.  The A282 is anomalous because it crosses only 1:2 and should be in zone 1.  The A202 crosses only 2:3 and is correctly in zone 2.  I can not see where the A202 enters zone 5, but if it did so west of London it would cross boundaries 2:3, 3:4 and 4:5 (an adjacent set starting with 2:) and still be numbered correctly. Certes (talk) 22:10, 22 March 2009 (UTC)
thread_title: Definition of anomalous

message: I question the existance of this road. The only section I can think of that this could mean is the A14/A1(M) spur at Alconbury, but the section from Huntingdon to Haverhill (Through Cambridge) has not been the A604 since the A14 was re-numbered. 
As a resident of the county in which this road is supposed to exist, I have no knowledge of it existing wither now or at any time in the past. Could someone please either confirm for or against and remove it if neccessary. - Burwellian 13:46, 4 August 2005 (UTC)
thread_title:  A604(M) 

message: Might want to stick A594 road here, as its the only example I know of a duplicate road number.  Morwen - Talk 15:23, 9 September 2005 (UTC)
replies: text: No there are other duplicate roads, which you can read about here.  They should really be on a new page, as this page is devoted to out-of-zone roads. GCarty 19:10, 9 September 2005 (UTC)
thread_title: A594

message: I think "Incorrectly" numbered roads is misleading - surely the numbers are correct, since they are the designated numbers given to the roads in question. "Inconsistently numbered roads" is a better choice, IMHO, since the numbering is inconsistent with the official system. Comments? TH 08:54, 16 September 2005 (UTC)
replies: text: I'll Support that. - JVG 12:37, 16 September 2005 (UTC)
replies: text: Renaming to "Anomalously numbered roads in Great Britain"... --GCarty 18:32, 16 September 2005 (UTC)
thread_title:  This article should be renamed 

message: This doesn't really fit into any of the categories listed; but the A601(M) should be the name of the a601 under motorway regulations. Infact, it is a small spur of the M6 near Carnforth; the A601 is in Derby! Should a new box be created for this?Robdurbar 08:26, 19 September 2005 (UTC)
thread_title:  A601(M)

message: An anonymous editor keeps removing the link to SABRE : The Society for All British Road Enthusiasts. I can't see any reason not to have this here - what does anyone else think? --OpenToppedBus - Talk to the driver 15:50, 24 November 2005 (UTC)
replies: text: The SABRE site itself may not be of that much interest to the subject matter of the article, but their road list certainly is. So I propose to link to the Road Lists directly. TH 10:43, 29 November 2005 (UTC)

text: Sounds good to me too. Evoke, once you're logged in you can sign and date using four tildes, like ~~~~. --OpenToppedBus - Talk to the driver 12:06, 29 November 2005 (UTC)
thread_title: External links

message: This section mixes duplicate roads with roads which seem to be included simply because they are many miles from roads with similar numbers.  I suggest that a more complete list of duplicates would be worth including but the other entries are not useful.  Could we rename the section as something like "Duplicate road numbers" and fill it out?  External links such as  should help. Certes (talk) 00:40, 5 December 2008 (UTC)
replies: text: It would be useful to also list roads "many miles" from similar numbered roads - by definition they have been irregularly numbered (see A598 for example). best, Sunil060902 (talk) 12:08, 5 December 2008 (UTC)
replies: text: Do you have a source for that definition? It would only be irregularly numbered if it goes against the defined rules for road numbering. Road Wizard (talk) 20:32, 5 December 2008 (UTC)

text: While there is no official rules (other than the zones) as to which roads get numbered, it can be observed that in general "batches" of numbers are allocated to specific areas (e.g. A44x, A45x to the Midlands). Even if it's not in such an official table, I feel it is worth mentioning, with a few obvious examples. It shouldn't be taken too far though (Pointing out the A4071 is a distance away from other A407x's is a bit extreme as they are relatively unimportant roads. jenuk1985 (talk) 20:58, 5 December 2008 (UTC)
replies: text: Yes, I would draw the line at three-digit A-roads. best, Sunil060902 (talk) 01:02, 7 December 2008 (UTC)

text: I disagree with the A50x, only the A500 and A506 are found north of Birmingham, but I think the current list has them all! By the way, I'm on SABRE too! best, Sunil060902 (talk) 18:06, 8 December 2008 (UTC)
thread_title:  Irregularities not based on the zoning system 

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thread_title:  External links modified 

message: I'm obviously missing something or misreading the criteria, but as the M62 crosses (extensively) into Zone 1, why is the anomaly that it should start 5, rather than 1? Julianhall (talk) 14:49, 11 November 2021 (UTC)
thread_title:  M62