Original Cambridge route The A1120 was the original Cambridge southern bypass, upgraded from the B1046 in the early 1930s. Starting on the
A603 Newnham Road the A1120 headed east along The Fen Causeway, which was only built in the mid-1920s (and opened as part of the B1046). A staggered crossroads took the road over the
A10 Trumpington Road, after which the road ran northeastwards along Lensfield Road and East Road, to end on the
A45 Newmarket Road. In 1935, the A1120 was renumbered as an eastern extension of the
A603 itself. The Fen Causeway has since been renumbered as part of the
A1134 ring road, although the
A603 is still here as the junior partner in a multiplex. == References ==