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British and Irish Roads
The study of British and Irish roads - their construction, numbering, history, mapping, past and future official roads proposals and general roads musings.
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Re: Why is the M20 signed as …
by Bryn666 View the latest post
Mon Nov 29, 2021 23:47
|Have you seen....?|
Numbering principles :
There is sometimes confusion about the separate numbering schemes for A-roads, B-roads and motorways within Great Britain. To the uninitiated, it may seem illogical to have the A275 in Sussex, the B275 in south London and the M275 in Portsmouth. This article attempts to set out the principles on which the three systems of numbering were originally developed, as well as explaining some of the changes to the system that have subsequently taken place.
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