Our impact

Limerick Tunnel, Ireland


The Limerick Project involves the design, construction, operation and maintenance of an approximately 10km-long tolled dual carriageway bypass to the southwest of Limerick, connecting Phase 1 of the Southern Ring Road to the existing N18 national highway, heading west to Shannon and the international airport. The Project includes a 675m-long immersed tube tunnel under the River Shannon.
Since opening, the tunnel and road link have diverted considerable volumes of traffic from the centre of Limerick City (over 3 million trucks diverted since completion), easing congestion in the city, whilst boosting economic development with completion of a strategic transport corridor across the region.



In Operation


ESG/SDG Key Facts

All waste (two-ton skips per annum) generated in the maintenance depot or collected from the road is removed to Greenstar (waste manager) recycling depot for sorting, recycling and/or landfill (as appropriate). The Project Company is looking to further improve recycling of all waste.

The Lighting Energy Controller (in place since 2012), for the lighting of the tunnel and the approaches, has generated electricity savings of 18% per annum.
A gender fair wage policy was put in place in 2021.


Learn more about the project:

Lighting the Limerick Tunnel



Connect Phase I of the Sothern Ring Road to the national highway


congestion in nearby cities


economic development with a daily capacity of 40,000 vehicles
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