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N8 Dunkettle Interchange Upgrade Scheme

John Sisk & Son





Project Description

The Project involves the reconfiguration of the existing Dunkettle Interchange to a freeflow Interchange catering for >100,000 vehicles per day. The scheme comprises 16km link roads linking the N8, M8, N40 and N25, 1 no. grade separated junction arrangement at the existing N25 and 4 no. roundabouts and local link roads, 18 principal structures, 8 retaining walls, 16 gantry structures, 8 VMS gantry structures and other minor structures (CCTV masts, ITS pole supports, environmental barriers and service protection slabs).

Services Provided

As part of a multidisciplinary design team, Clandillon Civil Consulting (CCC) were appointed as designer for three distinct phases of the project;

  • ECI design development – NEC Option 3 ECI contract
  • Early Works Contract
  • Design & Build Main Works Contract

As the Project Managers for the scheme, CCC were responsible for overseeing the production of all design deliverables associated with highways including drainage, structures, geotechnical and environmental elements. CCC were directly responsible for the highways and geometry design. As Designer’s Site Representative, CCC carried out site supervision during the construction of the works.

Notable Achievements

CCC in conjunction with its design partners developed the tender design which formed the basis of Sisk’s successful tender. 



Construction Ongoing