the old route through ipswich was renumbered as the a1214 following construction of the ipswich southern by-pass. the old route is more locally known by the road names, notably "london road" to the town centre and woodbridge road out the other side. the ipswich southern by-pass allows the a12 to overlap the a14 to seven hills interchange, from the copdock junction, where the a12 reappears and heads north. as the a14 the road passes over the large orwell bridge with total length of 1,287 metres. this has a summit at 43 metres above the river giving a humped feel with reduced visibility for traffic. there are at-grade roundabout junctions past bt adastral park at martlesham and around the woodbridge bypass.