the numbering of the a14 is inconsistent with the national road numbering scheme, as it begins in zone 5 and crosses through zone 6 on the way to zone 1 east of huntingdon to felixstowe. the road is concurrent with the a12 road from the seven hills interchange to the copdock interchange which forms the ipswich southern bypass and with the a11 road between junctions 36 and 38.