€215 million Dunkettle Interchange upgrade officially opens
The Dunkettle Interchange Upgrade Scheme has officially opened, marking a significant milestone in enhancing transportation infrastructure and connectivity in Cork. The €215 million project promises to alleviate congestion, improve safety, and streamline traffic flow for the region’s residents and businesses.
The Dunkettle Interchange is the junction of four national roads, the M8 Cork – Dublin Motorway, the N25 Cork – Waterford / Rosslare route, the N40 Cork South Ring Road and the N8 Dunkettle – Cork city National Route. The Interchange is located approximately 5 kilometres east of Cork City centre and lies mainly within the Cork City Council administrative area.
Whilst advance works including archaeological and ground investigations got underway in 2016, the main construction contract was awarded by Transport Infrastructure Ireland to John Sisk & Son Ltd in October 2020. The project has delivered 18 new road links totalling 10km in length; seven new bridge structures as well as upgrade works carried out on five pre-existing structures; and upgrades and resurfacing works to the N25 road between Tivoli Roundabout and the Little Island Interchange. In addition, 2.9km of new walkways and cycleways have been developed including the provision of a new bridge across the Cork-Midleton railway line; intelligent Transport Systems throughout the upgraded Interchange; and installation of new culverts and pollution control facilities, landscaping works, directional signage, safety barriers, etc.
Traffic volumes through the Dunkettle interchange are at an all-time high, approaching 120,000 vehicles on the busier days of the week. Despite this, Transport Infrastructure Ireland reports that journey times during peak hours have reduced by almost 50% on average as a result of this upgrade project.
Journey time savings of almost 60% are being achieved on the N40 to N25 route during peak hours, whilst time savings of over 50% are being achieved on routes accessed via the M8 Southbound.
Lord Mayor of Cork, Cllr. Kieran McCarthy said: “The new Interchange stands as an important additional piece in the strategic transport infrastructure in metropolitan Cork. This year marks 25 years since the Jack Lynch Tunnel opened, which in its day was seen as an engineering feat. The new interchange is also an engineering feat and adds to the adjacent tunnel’s story and narratives. In our time, the removal of critical bottlenecks creates better traffic flows but also greater connectivity between communities on either side of the River Lee’s estuary. The enhanced connectivity facilitated by this project will undoubtedly fuel progress and opportunity for generations to come.”
Will Merriman, Managing Director of Sisk’s Civil Engineering Ireland, said: “Dunkettle was an extremely complex project, working in and around live traffic at one of the country’s busiest intersections, in a major urban environment. We are delighted to have now delivered and handed over the project which has already improved traffic flow, mobility, and multi-user access in the region. I am particularly pleased that we have delivered on our promise of the highest standards of safety and quality with this complex infrastructure project.”
Patrick de Feu, Project Manager, Jacobs stated: “Jacobs welcome the opening of the Dunkettle Interchange, a project we have been involved in for over 10 years. Cork is a vibrant, growing city, a location that is hugely attractive for investment and as a place to live and work. Infrastructure projects like the Dunkettle Interchange Upgrade are critical to contribute positively to the quality of life for the community, sustain economic development and continue to ensure Cork’s position as a thriving city.”
The contract for the Dunkettle Interchange Upgrade Scheme includes a 3-year maintenance period which will run until 2027. In addition to environmental monitoring and landscaping management, this will also include an ongoing focus on monitoring traffic flows through the network.
