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A66 Long Newton grade separated junction


A66 Long Newton grade separated junction

Interserve was responsible for the design and construction of the £12 million grade-separated junction, comprising a new bridge over the A66 west of Long Newton and slip roads connecting the A66 to the local road network.

A new road was also built to the south of the A66, linking the villages of Elton and Long Newton, which improves access for cyclists, pedestrians and local traffic. This configuration has removed the need for local traffic to use the A66 and provides a safer means of joining and leaving the A66 via the new slip roads. The new junction also improves access to Durham Tees Valley Airport. The scheme began in March 2007 and the junction was fully open to traffic in May 2008 – three months ahead of planned contract completion.

Carbon footprint

An invaluable source of information on sustainable project delivery for Interserve, the site’s carbon footprint has been measured utilising the Environment Agency’s carbon calculator. We measured materials delivered (excluding recycled content), accommodation usage and journeys to and from site by all personnel. The data gathered will be used as a benchmark to set future targets for materials sourcing, to promote focus on local resources and to increase sustainability awareness.

The equipment

Using equipment from RMD Kwikform, our formwork and falsework specialist business, combined safety with speed. Minima, our modular wall formwork panel system, was used to the North and South abutment bases. The lightweight panels adapted to the structural concrete shapes, quickly and easily.

Using Alform and Super Slim Soldiers to construct the abutment wall pours resulted in faster concrete construction and reduced costs.

Paraslim was used to construct the cantilever parapets, whilst ensuring the safety of operatives and the road or rail traffic that may pass beneath the bridge under construction.

Kwikstage Shoring, one of the most cost effective modular steel shoring systems on the market, was used to support the soffits of the wing walls and curtain walls, whilst saving material and labour costs.


  • Improved safety for traffic after the local community had campaigned for action for 15 years to what was described as a ‘death trap’ junction.
  • Airport traffic removed from village.
  • Re-established the physical link between the communities of Long Newton and Elton after 40 years of artificial separation.
  • Stakeholder engagement with the local community, including public exhibition for residents, and site tours for staff and children of the local St Mary’s CofE Primary school. Interserve organised a painting competition for the children with the winners being rewarded with prizes and taking part in the official opening ceremony.
  • Improved air quality by preventing standing traffic at junctions.
  • Enhanced water environment from mitigation arrangements - three large ponds created as part of the drainage retention system; planted a screen of over 38,500 trees and shrubs and aquatic species to provide enhanced wildlife habitat.
  • Materials were reused on site, waste minimised and transport emissions reduced.
  • Reduced project CO2 emissions: 10,572 tonnes CO2 saved through use of 117,000 tonnes waste product instead of quarried stone; total carbon footprint for project measured as 11,700 tonnes CO2.
  • Use of light-weight materials reduced the foundations providing further savings in raw materials.
  • Delivered project two months ahead of schedule with no environmental enforcements and no reportable accidents.
  • Won the Silver Green Apple Award in 2008 for environmental best practice.
  • Received the 'Highly Commended' award for Community Benefit at the RICS North East Renaissance awards in 2010.

The judges at the Green Apple Awards commented: “This road improvement project has the aim to save lives, improve communities, and enhance the environment, all of which are high ambitions. The partnership between Interserve, Atkins, Amey and the Highways Agency has seen these aims comfortably achieved, even potentially increasing biodiversity in the area.”

Cheryl Moore, Chair of Governors of St Mary’s C of E Primary School said: “…on behalf of all the school governors, to thank you for the time and effort your company has put in to involve the children of the school in the road development project. They have learnt a great deal and are excited at the prospect of being involved in the opening celebrations.”


  • Client: Highways Agency
  • Length of road: 3.9km
  • Scheme cost: £12.43m
  • The A66 between Stockton on Tees and Darlington carries approximately 32,000 vehicles each day.

Equipment Services

Interserve's formwork and falsework business, RMD Kwikform is a global leader.

A Highways Agency scheme on Teesside, improving safety on the A66 dual carriageway between Stockton-on-Tees and Darlington and the village of Long Newton, was officially opened by Transport Minister, Tom Harris, in June 2008.