Duplicated road numbers

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This is a list of numbers that are currently in use in two different locations within the same numbering jurisdiction (Great Britain or Northern Ireland). It does not include roads such as the A34 or A46 which are currently in two or more sections as a consequence of the renumbering of intermediate sections.

Great Britain

A Roads

B Roads

C Roads

Class III Roads may be repeated from authority to authority, and some authorities have non standard numbering patterns; however, the following roads are considered duplicate numbers that conform to the rules of not being by division and not by re-use after the original number became defunct.

Cambridgeshire Council

Medway Council

Northern Ireland

The following duplicates have existed since the roads were first numbered. There has never been a B51 or B54, which suggests that the B52 and B53 duplications may be the result of a clerical error. The bizarre case of the two A37s, however, has never been explained.

See also