The six-lane dual carriageway with grade separated junctions to an extended M1 motorway was planned during the late 1960s along with the rest of the Ringway scheme.
This was originally planned to be continued south of its Staples Corner junction with the North Circular Road (Ringway 2) along the east side of the Midland Main Line through Cricklewood.
East of Camden Town, the NCR would have continued to follow the north side of the North London Line to Caledonian Road (A5203), where another junction would have been provided, then through Highbury and Canonbury to Dalston where the NCR would have passed over Kingsland High Street (A10) and along Ridley Road Market before a further junction would have been built to connect to the High Street and Dalston Lane.
The final section of the NCR would have crossed through Hackney town centre parallel with the railway viaduct, passing south of 16th century Sutton House, East London's oldest house, and on through Homerton and Hackney Wick where it would have interchanged with the East Cross Route coming north from Bow, the proposed M11 motorway coming south-west from Leyton and a motorway heading south-west towards Angel.
Due to the huge construction costs and widespread public opposition, the GLC had dropped the NCR from the Ringway Plans by 1972 and most of the rest of the scheme was cancelled in 1973.