A12 Road (England) - Bypasses

Bypasses

The Eastern Avenue was built in the 1920s as a bypass for the section between Romford and Ilford, meeting what was the A11 at Leytonstone. It was numbered A106 until the 1930s when it became part of the A12.

The 5-mile (8.0 km) long Brentwood bypass was opened in November 1965.

A bypass for Chelmsford was first included in the roads programme in 1968. Draft orders for the southern bypass were published in 1974, however the public inquiry in 1975 suggested that the government should re-examine the appropriateness of a 'central route' and the government delayed the road. In 1979 the government announced that it would proceed with the southern dual two lane route which opened in 1986.

Ipswich's 'Southern by-pass' via the Orwell Bridge being opened in 1982. This section was later designated as part of the A14.

The Martlesham bypass (previously known as the Kesgrave and Martlesham Bypass) was completed in 1987/1988 as was the Saxmundham bypass.

A white paper, Roads for Prosperity, published in 1989, proposed to widen the Chelmsford Bypass and the section from Hatfield Peverel to Witham to dual 3 lane; it also proposed widening to section from Saxmundham to Lowestoft and from Wickham Market to Farnham to dual 2 lanes. It also included a 'new route from the M25 to Chelmsford' as a dual two lane road following the proposed route of the M12 motorway.

The Department for Transport published Trunk roads, England, into the 1990s in May 1990 which included ten proposed developments for the A12 between the M25 and Lowestoft including the M12 motorway between M25 and the Chelmsford bypass, Chelmsford bypass widening and improvements on the sections from Hatfield Peverel to Marks Tey, Four Sisters to Stratford St. Mary, Martlesham to Wickham Market, Wickham Market to Saxmundham, the bypass around Saxmundham, Saxmundham to south of Wrentham, South of Wrentham to Kessingland and the Lowestoft relief road.

A public inquiry in the 'Saxmundham to Wickham Market bypass' was held in 1995 but this road has not been built.