The A12 is a major road in England, running from London to Great Yarmouth in Norfolk. Starting at the Blackwall Tunnel, it heads north, then north east by way of Leyton, Ilford and Romford, then into Essex, passing Brentwood, Ingatestone, Chelmsford, Witham and Colchester. In Suffolk, it passes Ipswich, Woodbridge and Saxmundham, then follows the coast through Lowestoft and Gorleston before ending at Great Yarmouth.