	The sections from Huntingdon east to the ports were upgraded first, starting with the Huntingdon bypass in 1973, followed by the Girton to Bar Hill section in 1975/76 and the Cambridge northern bypass and Cambridge/Newmarket section in 1976/77. The Bar Hill to Huntington section opened in 1979 prior to the M11 which was fully opened in 1980. The Ipswich southern bypass including the Orwell Bridge opened in 1982.