North Circular Road
|West end:||Chiswick (M4 Junction 1)|
| A205 road
The A406 or the North Circular Road is the 25.7-mile long road which crosses north London, linking the outer areas of west and east London. The speed limit is 30, 40 or 50 mph depending on the stretch of the road, including the sections with multiple carriageways.
Together with the South Circular Road, it forms a ring road through the inner part of Outer London. This ring road does not make a complete circuit of the city, being C-shaped rather than a complete loop as the crossing of the River Thames in the east is made on the Woolwich Ferry.
In the west, the A406 begins at junction 1 of the M4 Motorway at Gunnersbury, from which the South Circular Road (A205) heads south over Kew Bridge. The A406 runs north under the name "Gunnersbury Avenue". Whereas most of the South Circular goes by the names of the roads widened to accommodate it, the North Circular is typically called "North Circular Road". This is because the A406 has been subject to much more road improvement, often coupled with demolition of existing houses and urban infrastructure, hence the link with the old roads has been lost. In the west where improvements made slowest progress and the highway is now unlikely ever to be further widened, the original names are preserved.
Gunnersbury Lane runs past Gunnersbury Park and via one of the narrowest sections of the A406 to Ealing Common. It then becomes Hanger Lane, crossing a bridge to the foot of Hanger Hill at the top of which the name Hanger Lane is resumed until the Hanger Lane Gyratory System. This junction is a large roundabout beneath which the Western Avenue (A40) runs and is remarkable for the volume of traffic it collects and disperses. It incorporates Hanger Lane tube station.
North of this point the A406 is substantially widened and, as it does not follow a pre-existing road, assumes the "North Circular Road" name. The road is a six-lane, divided highway and the original route can be seen to the northwest where it passes the legendary Ace Cafe and goes through the original arches of the main railway line from Euston to Scotland and past Stonebridge Park station. The old and new road continue in parallel as the A406 passes under Harrow Road (A404, actually the continuation of what is generally called the Harrow Road from Paddington to Willesden) and join immediately thereafter.
The next traffic lights are notable for the IKEA store on the northwest side and the Neasden temple to the southeast (not visible), and the road twists fairly sharply left to cross the railway, originally in order to avoid housing and to run across more empty land past the Welsh Harp Reservoir.
Under the ensuing flyover are an interchange with Edgware Road (A5) and junction 1 of the M1 motorway at Staples Corner (often mistakenly thought to have been named after the huge Staples office supplies depot formerly plainly visible from the flyover - the real source was the Staples Mattresses factory on the site).
The NCR then passes Brent Cross Shopping Centre and runs beneath the Brent Cross Interchange (A41), and after approximately 1.5 miles (2.4 km) at Henlys Corner briefly shares carriageways with the A1 which joins it from the left and leaves it to the right to head into Central London.
The road passes north of St Pancras and Islington Cemetery where before Friern Barnet and Muswell Hill it takes the name Pinkham Way. The width of the span of the railway bridge means Pinkham Way narrows to two tight lanes in each direction. After the bridge the road is named Telford Road, and was recently (2009-11) widened to two lanes in each direction.
Turning right from Telford Road into Bowes Road, the NCR continues past densely packed housing and business areas before widening at Green Lanes and assuming the North Circular Road name again once it crosses Green Lanes. Bowes Road is the last part of the A406 (travelling clockwise) which has four carriageways.
At Great Cambridge Interchange, its most northerly point, the A406 crosses Great Cambridge Road (A10) and becomes Sterling Way (the name is derived from the original road in this area, Silver Street, parts of it which run alongside it). On emerging from the underpass, the A406 becomes Angel Road which leads into the Lea Valley Viaduct as it crosses the River Lea at Cook's Ferry. Angel Road railway station is partially located beneath the flyover at Angel Road.
After the viaduct the road becomes known as Southend Road, though perhaps it is more accurate to say that the two roads join. A road always did run from this point to Southend and though the new road is designated A406 and is very different from the old, the old name has been retained. Southend Road passes north of Walthamstow, and immediately before the Crooked Billet junction, the former site of Walthamstow dog track.
A fast section ensues, with a number of engineering challenges completed in the early 1990s before climbing a hill through the southernmost extremity of Epping Forest before ducking under Woodford New Road at Waterworks Corner. Heading down the hill east of the Waterworks the road enters a cutting, completed in the 1970s, and travels under the old A11 at Gates Corner (previously there were traffic lights at a crossroads here).
Next there is an elevated junction with the M11 motorway above Charlie Brown's Roundabout and the A406 takes the North Circular Road name again because the real Southend Road runs away to the east (A1400). The North Circular Road then turns south, passing Eastern Avenue (A12) on a flyover at Redbridge Interchange. It passes Romford Road to the west of Ilford, then crosses London Road in Barking, and ends at an interchange with the A13 Newham Way / Alfred's Way in Beckton.
The road then continues south of the junction as the A1020 and joins its previous alignment (see below) along the A117. This leads to the Woolwich Free Ferry across the River Thames, connecting with the eastern end of the South Circular Road on the other side of the river. The junction with the A13 has been built to enable the North Circular to be continued across the junction to the Thames Gateway Bridge when and if it is built.
Before the South Woodford to Barking Relief Road (the A406 section between the M11 and A13) opened in 1987, the A406 designation extended as far as east as Gants Hill. This old stretch (Southend Road and Woodford Avenue) has been renumbered the A1400. The official North Circular Road itself diverged at Waterworks Corner, and then followed the A104, A114, A116 and A117.
In the late 1960s the Greater London Council developed the London Ringways Plan to construct a series of circular and radial motorways throughout London to ease traffic congestion in the central area. Under this plan the North Circular Road was designated as the northern section of Ringway 2 and was scheduled to be upgraded to a motorway designated as the M15. Most of the Ringway Plans were cancelled in the early 1970s and the North Circular Road was never upgraded to full motorway standard, although much of it is now grade separated dual carriageway.
The section of the North Circular south of M11 junction 4 (the "South Woodford to Barking Relief Road") was constructed on the alignment planned for the unrealised motorway plans and the section between the M11 and A12 junctions was originally opened as part of the M11 with the interchange at Redbridge designated as M11 junction 3. The intention was to rename this section as M15 once the A406 upgrade to motorway standard had proceeded further but this never happened, and the road was eventually downgraded from motorway to 'A' road keeping the existing A406 designation.
Although the route has alternative names at some points, it is generally referred to as the North Circular throughout for route planning purposes. The route is mostly grade-separated dual carriageway from the A40 to the A13 except for the Drury Way/Brentfield Road junction, the Golders Green Road/Brent Street junction, Henlys Corner and the section from Bounds Green to Green Lanes.
In 2004, Mayor of London Ken Livingstone promised limited improvements to the road, but received criticism for not approving earlier plans for widening the often heavily congested road at critical sections.
In 2009, it was announced that major works between the Bounds Green Road and Green Lanes junctions would finally go ahead. Work to divert utility lines such as telephone and gas supplies started in late 2009 and was due for completion in February 2010. Major works have began in May 2010 and are now complete.
The work improved the carriageway between these junctions, widening Telford Road to two lanes and improving all of the junctions along the route. Improvements were also made to walkways and cycle paths along this route. However, the new junctions are not grade-separated. This is in contrast to the design of junctions further down the road in both directions. This design decision represents the major difference between the original Highways Agency scheme and the smaller TfL version that was implemented.
In April 2011, a long-awaited major upgrade of the Henlys Corner interchange began. This was after many years of proposals, design changes and delays. An underpass was originally proposed but this was heavily criticised by local residents, and would have been very costly, and was subsequently scrapped. The upgrade scheme improved on the current junction by adding extra lanes and allowing easier left and right turns, speeding up queue times. Cycle paths and safer pedestrian crossings were included. The scheme is generally regarded as having been a great success.
- Detailed plans on Transport For London Website
- "Work on Henlys Corner junction improvement scheme to begin in February 2011". Retrieved 4 June 2011.