Construction work for highways, roads

Tender description

The completed project will provide a fully grade-separated interchange to replace the existing signalised gyratory junction. Interchange links between Westlink, M2 and M3 will be provided in underpasses aligned beneath new bridge structures at York Street and under the existing Dargan and Lagan bridges. The existing North Queen Street and Dock Street over-bridges and Whitla Street subway structure will be widened as necessary to accommodate the new road layout, with a new over-bridge structure proposed at Dock Street. Retaining walls and piled embankments will be provided as required to support the new road alignments. The contract will be based on the NEC3 PSC, supplemented by the NEC3 ECC Option B: priced contract element with bill of quantities and NEC3 ECC Option C: Target contract element with activity schedule and will involve open-book accounting procedures. The project elements include, but are not limited to, the following: — the construction of an overall length of approximately 5 km of road pavement, including new pavement construction and works to existing carriageways, — the widening and realignment of the Westlink north of the Clifton Street junction, with new interchange links in a generally east to north-east direction providing connection to and from the M2 motorway, along with additional interchange links in an eastern direction to provide connection to and from the M3 motorway. These links are aligned below the existing superstructure of the Lagan road and Dargan rail bridges and between their various substructures, — Bridges at York Street and Dock Street to grade separate these interchange links from the existing surface streets. Additional slip roads are provided from the interchange links to the surface streets at York Street, Dock Street, Nelson Street and Duncrue Street.