|Length:||129 miles (207.6 km)|
|Meets:||M25, A11, A13, A127, A1114, A130, A414, A120, A133, A14, A1117, A47|
|Former Number(s):||A102, A102(M), A106|
|Old route now:||A47|
|Route outline (key)|
The A12 is a major road from London to Lowestoft via Chelmsford, Colchester and Ipswich. It is the most easternmost road in Britain (at Lowestoft town centre) and is one of the main arterial routes through East Anglia, and is a particularly important connection (with the A14) for goods traffic between London and the Port of Felixstowe. Despite this, the current road has largely been built out of a series of unconnected bypass plans and online dualling, and traffic particularly suffers between the M25 and A14.
Like many of the first 99, the A12 has had a vast array of upgrades. Unlike most of them, the upgrades are a group of bypasses that just happens to make a major road. Also parts of the old road are now abandoned.
Notable locations and improvements
The Redbridge Roundabout is where the A12 meets the North Circular road. Built in the 1970's for the M15, now numbered A406, the roundabout today is very busy. It is also right by Redbridge Tube Station.
Brook Street Interchange
Brook Street Interchange was first built in the 1970's as part of the Brentwood Bypass. The old road was renumbered A1023. In 1983 the M25 was built on top of the existing interchange. Today it is one of the busiest junctions of the M25 due to the fact the A12 is the only road from London to the southern end of East Anglia.
Copdock Interchange is where the A12 meets the A14. A very busy junction as all A12 traffic is dumped onto the Eastbound A14. It also where the old A12 goes straight towards Ipswich.
|2016||A47 extended from Great Yarmouth to Lowestoft, reducing the length of the A12||Road renumbering|
|2000||A12 extended to A13||Road renumbering|
|1999||Redbridge to Hackney wick||New Dual carriageway|
|1993||Great Yarmouth and Gorleston Relief Road||Built on an old railway line|
|1986||Chelmsford second bypass|
|1974||Colchester second bypass|
|1971||Stanway and Lexden bypass|
|1965||Hatfield Peverel bypass|
|1933||Colchester first bypass|
|1931||Chelsmford first bypass|
|1930||Ipswich first bypass|
|1924||Eastern Avenue||Opened as A106|
In December 2017, it was proposed that the A12 could be upgraded to an expressway as part of the proposals to introduce a new type of road network. The proposal includes different expressway types with an aspiration that the highest quality expressways will be given motorway designation and an Ax(M) number. (Source: Highways England Strategic Road Network Initial Report)
- M11 Link Road (11 March 1994) - different opinions in the house on the road
- The A12 Trunk Road (Lowestoft Northern Spine Road, Suffolk) (Trunking and Detrunking) Order 2016 - minor orders relating to junction improvements at the A12/B1385 junction in Lowestoft
- The A12 London–Great Yarmouth Trunk Road (A12/A14 Seven Hills Roundabout to South of Bascule Bridge) Detrunking Order 2001 - Detrunking of the section between Ipswich and Lowestoft