Margary numbers are the numbering scheme developed by the historian Ivan Margary to catalogue known and suspected Roman roads in Britain in his 1955 work The Roman Roads of Britain.
[1] They remain the standard system used by archaeologists and historians to identify individual Roman roads within Britain.
[1] It is not known how the Romans identified the roads they built within Britain, and well-known names such as Watling Street and the Fosse Way largely date from the Anglo-Saxon period, are sometimes ambiguous or duplicated, and cover only a small proportion of the known network.
[2] Margary's cataloguing system has been criticised as being essentially arbitrary in several respects.
[4] Margary's hierarchy of routes is not necessarily that of the original designers or users of the network.