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A6 Randalstown to Castledawson Dualling Scheme

A6 Dualling Scheme unlocks strategic route

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Project Overview

Client Department for Infrastructure
Project Value £135m
Expertise Civil Engineering
Sector Highways
Timeline October 2016 - April 2021
Location Northern Ireland
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Project summary

Notable for the achievement of 25% cost savings (£42m) at the Early Contractor Involvement (ECI) stage, we are responsible for the completion of the A6 Randalstown – Castledawson Dualling Scheme as part of a Joint Venture (JV) with Farrans. Valued at £135m, the four-and-a-half-year project involves the design and construction of 14.7km of dual carriageway through a predominantly rural landscape and the extension of the M22 north.

As traffic levels continue to grow towards 20,000 vehicles per day, this vital highways infrastructure project will improve road safety, reduce journey times and congestion on this strategically important North West transport corridor, connecting Belfast and Derry/Londonderry.

The detail

Since breaking ground in summer 2017, significant progress has been made by the GRAHAM/Farrans JV with work on 15 of 21 structures underway, six borrow pits are in operation, a considerable amount of earthworks are complete and the laying of pavement has commenced.

The successful implementation of ECI on the A6 project has enabled our expert team to contribute to the development of the design and provided us with the opportunity to consider construction issues at an early stage. Importantly, it also created the conditions for the delivery of significant cost savings, resulting from the exploitation of a range of efficiency avenues, including earthworks (securing borrow pits with local landowner agreements to win Class 2 material), drainage/culverts (VE opportunities in shortening/combining/straightening culverts), structures (designed as a family of structures, elimination of retaining walls) and programme (reduction of overall programme as a result of ECI logic development).

Project Gallery

“The completion of the first phase is a significant milestone for the scheme and welcome news for the 20,000 vehicles using the route each day. The feedback from road users since the opening of the first stretch of new dual carriageway has already been extremely positive, with shorter, safer and more reliable journey times already experienced."

Katrina Godfrey, Permanent Secretary, Department for Infrastructure