The section from Bow Interchange to Gallows Corner formed the original route of the A12 until the designation was transferred to the Eastern Avenue soon after the latter opened in 1925. Parts of the route have an even older pedigree, forming the Camulodunum to Londinium extension of the Pye Road.
Western extension
Recently, the A118 was extended westwards from its former terminus at Stratford to Bow, taking over the former A11 Stratford High Street when the A12 extension opened in 1999. Thus 70 years after the Eastern Avenue was built, the A12 finally by-passed the whole of the A118, unlike the situation previously, where the A12 ended on the A11 due north of Stratford at Leytonstone.
The road is served by London Buses route 86 for most its length along with 174 and 498 using the Main Road stretch.with other routes serving various sections. The same route is also followed by part of the Great Eastern Main Line.