London

M25 J10 Improvement 28 August 2017

Upgrade work at M25 junction 10, where the motorway crosses the A3. The scheme is intended to relieve the chronic congestion suffered at this busy junction. At present all turning traffic passes through one large signalised roundabout which is operating beyond the limits of its capacity for significant parts of the day.

A large number of options were considered for the work, including radical plans to replace the junction entirely with a new free-flowing four-way interchange of one type or another. However, there are now two options remaining which have gone out to consultation.

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M25 J10-16 Smart Motorway 28 August 2017

Upgrade of several sections of the M25 to Smart Motorway between junctions 10 (the A3 at Wisley) and 16 (the M40 at Denham).

The M25 already has some Smart Motorway technology along this full length, and was in fact the first motorway in the UK to have Variable Speed Limits, which have been operational here for at least 20 years. This scheme is therefore not a standard Smart Motorway project, and instead it will introduce All Lane Running at four specific locations:

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M25 J28 Improvement 27 August 2017

Improvements to M25 junction 28, the interchange with the A12 and A1023 west of Brentwood, to alleviate congestion that is currently a frequent problem. The existing junction is a Three Level Stacked Roundabout but extremely high volumes of turning traffic make the signalised roundabout a serious problem.

The preferred route, announced in summer 2017, is option 5F which will provide a very large looped sliproad from the anticlockwise M25 to the eastbound A12. New bridges will allow it to cross the existing sliproads to and from the roundabout.

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Low Emission Zone 4 November 2014

A first step towards emissions-based road pricing, a pointless measure to enforce something that's happening anyway, or another leap forward in traffic planning from the people who created the Congestion Charge? It's hard to say.

Guides

A406 Bounds Green Improvement 21 July 2010

Upgrade of an existing single-carriageway stretch of A406 North Circular Road to a dual carriageway standard. This Transport for London project is a watered down version of the improvements planned but never implemented by the Highways Agency. It involves less property demolition and is a fraction of the cost, but is unlikely to be grade-separated. Even so, any extra capacity here is welcome - it is currently a single-carriageway section of an otherwise dualled and grade-separated road in a busy urban area.

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A23 Coulsdon Relief Road 26 October 2008

A new single carriageway three-lane road, realigning the A23 away from the main commercial area of Coulsdon, though the new road still passes through the town. It will terminate at a roundabout at each end, and along its length will have a normal traffic lane in each direction plus a special purpose bus, cycle and HGV lane northbound. This was one of the only road schemes approved by anti-car London mayor, Ken Livingston.

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A13 Thames Gateway 26 October 2008

Upgrade of the A13 between Barking and Docklands to grade-separated dual carriageway route. Despite Transport for London's anti-car policies, the scheme continues to go ahead because it is part of a private-finance DBFO contract that was let when the A13 was in the hands of the Highways Agency.

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Underways 11 November 2006

Proposed at the same time as the Ringways, but ten times as ambitious - and to think the government considered building them both!

Histories