for most of its remaining length through suffolk the a12 is a mostly single carriageway road, and in many places its speed limit is less than the national limit, for example as it passes through towns and villages. during 2003/2004 some of these speed restrictions were further reduced from to . there are, though, a few stretches of dual carriageway between the woodbridge bypass and lowestoft (at wickham market, saxmundham, wangford and kessingland). this section of the a12 was detrunked in 2001 as part of the highways agency's streamlining of its trunk road network. control was therefore passed to the local authorities. just south of blythburgh, the old milestone shows it is to london.