A12 road (England)

Route map:
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Source: Wikipedia, the free encyclopedia.

A12 shield
A12
A12 London Road, Wrentham - crop.jpg
The A12 at Wrentham, heading toward Ipswich
Route information
Part of E30
Length118.8 mi



M25 near Brentwood
A414 in Margaretting




A1144 in Lowestoft 52°28′26″N 1°45′02″E / 52.473840°N 1.750436°E / 52.473840; 1.750436
Location
Country
Primary
destinations
Stratford
Romford
Chelmsford
Colchester
Ipswich
Lowestoft
Road network
A13

The A12 is a major road in Eastern England. It runs north-east/south-west between London and the coastal town of

A55
, has junction numbers as if it were a motorway.

The 52 miles (84 km) section of the A12 through Essex has sections of dual two lanes and dual three lanes, with eight changes in width between the M25 to Ipswich.

Highways England's A12 and A120 Route Management Strategy.[6]

Starting just north of the

town centre.

History

The A12 was formed in 1922 as part of the

The route from London to Essex has long been important, with Old Ford being the location of an ancient Celtic crossing of the River Lea.[13] The route was altered slightly by the Romans who created a paved road from London to Colchester, which was part of Inter V on the Antonine Itinerary,[14] and parts of this were used by a turnpike road, the Great Essex Road.[15] The crossing of the Lea moved to its current location at Bow around 1110 when Matilda, wife of Henry I, ordered a distinctively bow-shaped, three-arched bridge to be built over the river.[13][16] A map from 1766 shows a route from London to Lowestoft which follows much of the current A12.[17]

The "Ipswich to South Town and Bungay Turnpike Trust" was established in 1785, operating between Ipswich and Great Yarmouth.

East Suffolk Line which was fully operational between the two towns in 1859.[19] Following the demise of the Turnpike trust, responsibility reverted to parish responsibility until the new county councils took over in 1889.[19]

Roman Road
from London to Colchester.

A new section of the A12, known as the "M11 link road" or "A12 Hackney-M11 Link Road", was built in the early 1990s in the face of the major M11 link road protest and finally opened in October 1999.[20] The section of road had originally been proposed in 1903 in a Royal Commission on London Traffic. A public inquiry had been held in September 1961 and a further three public inquiries, a Parliamentary Bill and a High Court challenge had been required before the work started.[21]

Initiated in 2000, the London to Ipswich Multi-modal study reported its conclusions late in 2002.[22]

In 2008 improvements were made to the junction between the A12 and the M25 to increase slip-road capacity, in particular for clockwise M25 traffic turning north onto the A12, and to ease congestion on the Brook Street Roundabout (serving the M25, A12 and local Brentwood traffic as the A1023).[23]

The bascule bridge in Lowestoft was built in 1972,[24] and was refurbished in spring 2008.[25]

Essex County Council carried out its own inquiry into the road in 2008. Work on a £12.4m scheme for the a new junction on the A12 at Cuckoo Farm, Colchester adjacent to the Colchester Community Stadium started in December 2009. It was promoted by Essex County Council who prepared plans in 2001.[26] and received funding from the Community Infrastructure Fund.[27] It opened on 16 December 2010.[28]

The section of A12 between

Highways England. The section between Ipswich and Lowestoft was de-trunked in 2001, with control passing to Suffolk County Council
. This section is primarily single carriageway.

In 2011, at Junction 33 (Copdock Interchange) the junction was widened and improved to ease the increasing traffic flow along the road. Works ended in 2012. A widening of the section from Chelmsford to the A120 junction near Colchester is proposed with a start date in 2023/2024 and expected to complete around 2028.[29]

Bypasses

The Eastern Avenue was built in the 1920s as a bypass for the section between

A106
until the 1930s when it became part of the A12.

The 5-mile (8 km) long Brentwood bypass was opened in November 1965.[30]

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.[31]

The Wickham Market bypass opened in July 1976, providing a much needed improvement to avoid the narrow, one-lane wide section of road through Wickham Market.[32]

Wickham Market A12 Bypass

Ipswich's "Southern by-pass" via the Orwell Bridge was opened in 1982. This section, when first numbered, was part of the A45 and later designated as part of the A14.

The Martlesham bypass (previously known as the Kesgrave and Martlesham Bypass) was completed in 1987/1988[33] as was the Saxmundham bypass.[34]

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 the 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.[35]

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.[36]

A public inquiry in the "Saxmundham to Wickham Market bypass" was held in 1995[37] but this road has not been built.

M12 motorway

During the 1940s, there were plans for a motorway between South Woodford and Brentwood, initially dubbed Radial Route 7, which later became the M12 motorway in the 1960s. This would have run from the North Circular Road in London, at the base of the current M11 motorway, joining the A12 north of Brentwood.[38] The North Circular was to be upgraded to motorway-standard as part of Ringway 2 and be designated as the M15 motorway. The M11 was to have provided a motorway standard road into central London past Ringway 1, terminating at the Angel in Islington. The M12 motorway was never built, although the junction of the M11 with the North Circular was designed to accommodate it.[39]

The scheme was revived in the late 1980s, and extended the northern section to the A12 near Chelmsford. Plans for the M12 motorway were withdrawn in March 1994, following a review of the trunk roads programme.[40]

Route

Route of A12 from OpenStreetMap
A12 (Numbered junctions)
Northbound exits Junction Southbound exits
Essex
M25, Brentwood A1023 11 (M25 J28 – Brook Street) M25, Brentwood A1023
B1002
12 (Mountnessing Marylands)
B1002
No Exit 13 (Trueloves)
B1002
Margaretting 14 (Furze Hill) No Exit
B1002
15 (Webb's Farm)
B1002
B1007
16 (Stock Road)
B1007
A1114
17 (Howe Green)
A1114
A414 18 (Sandon) A414
Stansted Airport, Sudbury, Braintree
A130 (A131)
19 (Boreham) Sudbury (A131)
A138
Hatfield Peverel 20a (Hatfield Peverel South) No Exit
No Exit 20b (Hatfield Peverel North) Hatfield Peverel
B1389
21 (Lynfield Motors) No Exit
B1389
22 (Coleman's)
B1389
B1024
23 (Kelvedon South) No Exit
No Exit 24 (Kelvedon North)
B1024
B1408
25 (Marks Tey)
B1408
A1124
26 (Colchester West)
A1124
A133
27 (Colchester Central) No Exit
Colchester (North) 28 (Colchester North) Colchester (North)
A1232
29 (Ardleigh Crown)
A1232
Suffolk
B1029
30 (Park Lane Birchwood)
B1029
East Bergholt 31 East Bergholt
Capel St. Mary
32a (Capel St. Mary South)
Capel St. Mary
C475 London Road 32b (Bentley Longwood) C475 London Road
London,
A14, A1214
33 (
A14
J55 – Copdock Mill)
End of concurrency with
A14

Road signposted as A14 to A14 J58 & As A12 to Lowestoft

London

The A12 starts just north of the

underpasses
and was built in the late 1960s, previously called the A102(M). The road turns North Eastwards at the unfinished Hackney Wick Interchange where the carriageways split and the northbound carriageway has a right hand entrance. When the
A406 through this junction and to Angel
. The A12 heads to Lea. The section from the Lea Interchange to Leytonstone, also known as the M11 Link road, was built in the 1990s in the face of a major road protest. During this work the old section as far as Wanstead was rebuilt as a dual carriageway. Prior to that, the A12 started at the Green Man Roundabout at Leytonstone, and was single carriageway west of Wanstead Underground station. It now has an underpass at that roundabout, which again is a junction with the old A11. East of Wanstead, the A12 runs roughly due east. It is known as
Roman road from Colchester to London running through Ilford and Romford (today's A118). The eastern end of the Eastern Avenue is Gallows Corner in the London Borough of Havering, just east of Romford. The junction also marks the start-point of the A127 Southend Arterial Road, also 1920s vintage. At the roundabout, an extemporised two-lane flyover still provides priority for A12 eastbound to A127 traffic (and vice versa). However, the A12 now veers roughly north-eastward, because it starts to follow the course of the Roman road; the Romans started building this road from Colchester, their original capital for the province. However, the 2.5-mile (4.0 km) stretch from Gallows Corner to the junction with the M25 motorway
, called Colchester Road, is still perfectly straight. The M25 junction is number 28; it also marks where the A12 crosses the boundary from London to Essex.

Essex

Originally, the A12 followed the route of the Roman road closely and so was fairly straight, but there are now several town bypasses, so the road through Essex now has several meanders. The A12 formerly went through Brentwood, Mountnessing, Ingatestone, Margaretting, Chelmsford, Boreham, Hatfield Peverel, Witham, Kelvedon, Copford, Stanway and Colchester, but these are all now bypassed, and the A12 is a dual carriageway with mostly grade-separated junctions for its whole length in Essex.

It is this stretch of the A12, particularly between Chelmsford and Colchester, which has led to the poor reputation for surface quality of the A12. This is mainly for its bumpy or potholed surface, mostly due to worn concrete surfaces. In an ongoing process these sections are being relaid with tarmac, however some sections including the Kelvedon bypass, and between Copford and Stanway have yet to be resurfaced.

Built in 1982, the A12 Colchester bypass provides an uninterrupted dual carriageway where the national speed limit of 70 mph applies. Before 1982, the A12 took a route much closer to Colchester itself, and although still a bypass it consisted of urban single carriageways with roundabouts and pedestrian crossings. The old bypass is still in existence – the western half now forms part of the

A133
.

Suffolk

The Suffolk stretch of the A12 starts with the Capel St Mary bypass. Originally the route from the Northern end of this bypass ran through the villages of Washbrook and Copdock and into Ipswich. When Ipswich's Southern by-pass was built in the early 1980s, the route picked up from the northern Capel St Mary junction (now numbered 32b), to pass to the West of the original line – this allowed the relevant ground works and interchanges to be completed with minimal traffic disruption. The old dual carriageway through Washbrook and Copdock is blocked off at White's Corner and was renumbered to be the C475.[41] A footpath still exists which enables passage underneath the A14.

multiplexed with the A14) passes over the Orwell Bridge
south of Ipswich

The old route through Ipswich was renumbered as the

A14 to Seven Hills Interchange, 7 miles (11 km) 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.

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 40 mph (64 km/h) to 30 mph (48 km/h). 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 100 miles (160 km) to London.

The A47 passes over Breydon Bridge to the west of Great Yarmouth, close to where the A47 and A12 originally met.

The A12 ran through Lowestoft for about 5 miles (8 km) on urban 30 mph (48 km/h) limited roads. However, as of June 2006, the A12 now follows the course of the new single carriageway 40 miles per hour (64 km/h) Southern Relief Road that joins the original A12 at Lowestoft bascule bridge. A further impediment is the harbour bridge, which has three lanes, the centre lane operating as a one-way addition to whichever direction of flow is deemed greater. The presence of these bridge choke points can cause serious disruption to north–south trunk traffic, especially when local traffic is added during rush hours. An adequate bypass for Lowestoft would need to be well to the west, even to the west of Oulton Broad (the body of water), and its route would have to consider the great areas of marshland in that area. As of 2021 a new bridge is under construction in Lowestoft. It is due to be designated part of the A12 on its completion in early 2024, carrying traffic onto the existing A1117 northern relief road (which will also become the A12) to the A47 north of the town.[42][43] [44]

Norfolk

From February 2017, the A12 no longer reaches Norfolk as it terminates in Lowestoft at 52°28′26″N 1°45′02″E / 52.473840°N 1.750436°E / 52.473840; 1.750436. Before February 2017, From a point just south west of the mouth of the River Yare, northwards to the point where it crosses the River Yare in Great Yarmouth, the A12 followed the route originally used by the railway line from Lowestoft to its terminus north of Breydon Bridge[45] at Vauxhall Roundabout where the A47 previously terminated.[46]

Junction list

CountyLocationmi[1][2]kmJctDestinationsNotes
South-western terminus; continues as A102 beyond A13
0.71.1Begin freeway
Devas StreetNorth-east exit and entrance
Gillender Street / TwelvetreesSouth-west exit only
0.91.4St Leonards StreetNorth-east exit only
1.0–
1.3
1.6–
2.1
1.5–
1.8
2.4–
2.9
B142 – Old Ford
A106 – Dalston, Hackney, Clapton
No southwest exit
Leyton signed north-east only, other destinations south-west only
A113 and Wanstead signed north-east only, Leyton south-west only
Redbridge6.510.5WansteadSouth-west exit and north-east entrance only
6.911.1End freeway
6.9–
7.1
11.1–
11.4
A406 junction 4
8.012.9
A123 (Cranbrook Road) – Woodford, Ilford, Hainault, Barkingside
South-eastern terminus of A1400
A1112 (Whaleborne Lane North) – Dagenham, Marks Gate, Hainault, Becontree Heath, Chadwell Heath
A125 south (North Street) / B175 (Havering Road) – Romford, Collier Row, Hornchurch, Havering-atte-Bower, Ongar
Hornchurch, Havering-atte-Bower, and Ongar signed north-east only
14.924.0 Eastern terminus of A118
Greater LondonEssex boundaryHaveringBrentwood
boundary
16.927.2Begin freeway
16.9–
17.6
27.2–
28.3
11 South-western terminus of A1023; M25 junction 28
A1023 south-west / B1002 – Brentwood, Ingatestone, Mountnessing
B1002, Ingatestone, and Mountnessing signed south-west only
Heybridge22.7–
24.0
36.5–
38.6
13B1002 – IngatestoneNo north-east exit
Margaretting26.142.014B1002 – MargarettingNorth-east exit and south-west entrance
26.8–
27.2
43.1–
43.8
15
A414 west / B1002 – Harlow, Chelmsford, Margaretting
B1002 and Margaretting signed south-west only; south-western terminus of A414 concurrency
Galleywood28.7–
29.0
46.2–
46.7
16B1007 – Galleywood, Billericay
A1114 north-west – Southend, Basildon, Chelmsford
South-western terminus of A130 concurrency; south-eastern terminus of A1114
A414 east – Maldon
North-eastern terminus of A414 concurrency
Braintree signed north-east only, To A138 and Sudbury south-west only; north-eastern terminus of A414 concurrency
Hatfield Peverel37.9–
38.2
61.0–
61.5
20AB1137 – Hatfield PeverelNorth-east exit and south-west entrance
39.162.920BB1137 – Hatfield PeverelSouth-west exit and north-east entrance
Hatfield Peverel
Witham boundary
39.7–
40.0
63.9–
64.4
21B1389 – WithamNo south-west exit
Witham42.5–
42.7
68.4–
68.7
22B1389 to B1018 – Witham, Maldon
Rivenhall End43.369.7Great Braxted, Silver End, RivenhallRivenhall signed north-east only
Kelvedon44.271.123B1024 to B1023 – Kelvedon, TiptreeNorth-east exit and south-west entrance
Feering47.175.824B1024 to B1023 – Kelvedon, TiptreeSouth-west exit and north-east entrance
A120 west – Marks Tey, Stansted Airport
South-western terminus of A120 concurrency
A1124 – Halstead, Stanway
A133 – Colchester
North-east exit and south-west entrance
56.4–
56.8
90.8–
91.4
28
A134 – Sudbury, Colchester
A1232 – Colchester North, Clacton, Harwich
North-eastern terminus of A120 concurrency
LanghamDedham
boundary
59.495.6Ardleigh, LanghamNorth-east exit and entrance
59.796.1Ardleigh, LanghamSouth-west exit and entrance
60.1–
60.3
96.7–
97.0
Stratford St. Mary, Dedham, HighamNorth-east exit and south-west entrance
SuffolkStratford St. Mary61.9–
62.2
99.6–
100.1
30B1029 – Dedham, Stratford St. Mary
Holton St Mary
East Bergholt
boundary
63.6102.431B1070 – Hadleigh, Flatford, Raydon, Holton St MaryFlatford, Raydon, and Holton St Mary signed north-east only
Capel St. Mary, Bentley
Destinations signed south-west only
Copdock and Washbrook
Bentley boundary
66.7–
67.3
107.3–
108.3
32BWashbrook, Copdock
68.9110.9End freeway
68.9–
69.4
110.9–
111.7
The Midlands signed south-west only; junction on A14; south-western terminus of A14 concurrency; western terminus of A1214
WhersteadIpswich
boundary
71.7–
72.5
115.4–
116.7
Orwell Bridge over River Orwell
A1189 – Ipswich, Nacton
75.8–
76.0
122.0–
122.3
A1156 north-west – Felixstowe, Ipswich, Bucklesham, Levington
North-eastern terminus of A14 concurrency; south-eastern terminus of A1156
A1214 west / Main Road – Ipswich, Martlesham, Little Bealings, Kesgrave
Eastern terminus of A1214
A1152 east (Woods Lane) – Orford, Rendlesham, Woodbridge, Suffolk, Melton
Western terminus of A1152
Ufford84.7136.3B1438 – Melton, UffordGrade-separated junction; south-west exit and entrance
Pettistree85.7–
86.2
137.9–
138.7
Pettistree, Ufford, Wickham MarketGrade-separated junction; north-east exit and entrance
Hacheston87.9–
88.3
141.5–
142.1
B1116 / B1078 – Framlingham, Wickham Market, Orford, Hacheston, Campsea AsheGrade-separated junction
A1094 east to B1069 – Aldeburgh, Leiston, Snape
To B1069 and Leiston signed north-east only, Snape south-west only; western terminus of A1094
Yoxford98.5158.5High Street (A1120 west) – Yoxford village centre, Sibton, Peasenhall, FramlinghamFramlingham signed north-east only; eastern terminus of A1120
A144 north – Halesworth, Bungay
Southern terminus of A144
A145 north to B1123 – Beccles, Halesworth
Southern terminus of A145
104.9168.8
A1095 east (Halesworth Road) – Southwold, Reydon
Western terminus of A1095
Southern terminus of A1117; eastern terminus of A1145
118.2190.2
A47 north (Waveney Road) – Great Yarmouth
Southern terminus of A47
118.8191.2
A47 / B1074 – Beccles, Great Yarmouth, Somerleyton
North-eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Proposed Improvements

2024 Lowestoft Gull Wing Bridge

A new 8 span bridge is being constructed over the river in Lowestoft (Suffolk). On completion in early 2024 it will carry the A12 over the river from the existing A12 roundabout at Tom Crisp Way. From there, Peto Way and the A1117 (Peto Way & Millennium Way) will become part of the A12, leaving it to terminate at the towns northern roundabout which acts as a junction onto the A47.[42][43] [47]

2008 Technology Upgrades

In November 2008 the government announced a £60 million technology package including variable message signs, CCTV, Automatic Number Plate Recognition cameras and automatic incident detection sensors embedded in the road surface to improve journey reliability, reduce delays and give better information to drivers.[48] Work is due to start in 2011/12.[49]

1986 Proposed Bypasses

A bypass for various villages was proposed in 1986 as part of the government's 1989 Roads for Prosperity white paper which detailed many road schemes across the country. Suffolk county council considered a bypass for the villages of Farnham, Stratford St Andrew, Glemham and Marlesford for the 2006 Local Transport Plan.[50] The scheme will not be implemented until after 2016.[51] Essex county council has put forwards plans for a bypass of Chelmsford connecting Junction 19 of the A12 to the A131.[52] Plans to upgrade additional sections of the A120 into a dual two-lane carriageway were scrapped in 2009.[53]

2008 inquiry

In response to this increasing congestion,

Sir David Rowlands, KCB, a former Permanent Secretary at the Department for Transport, with professor Stephen Glaister, David Quarmby and Lord Whitty
, all with significant knowledge of the transport sector.

The inquiry began taking submissions in April 2008.

Highways Agency officials, MPs, local and regional agencies and authorities, the emergency services, business and motoring groups. Comments were also received from over two hundred members of the public and through a petition organised by the Essex Chronicle newspaper. The commissions finding were published in July 2008[57]
and its outline recommendations are:

  • the A12 as far as Ipswich should be brought up to modern dual 2-lane standards (where not already dual-3), with urgent priority given to the Hatfield Peverel – Marks Tey section
  • substandard lay-bys should be replaced; one or more locations off but near the A12 should be identified for secure HGV parking, and an HGV overtaking ban should be trialled
  • a wide range of short term practical measures should be introduced to improve safety and reduce driver stress, such as selective speed limits and better information for drivers, and to improve the recovery from incidents and closures
  • a New Route Management Strategy should be drawn up by the Highways Agency, in collaboration with local stakeholders, and an 'A12 Alliance' should be formed to consolidate and sustain the momentum for improvement

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External links

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