Limerick Tunnel

Coordinates: 52°39′18″N 8°41′10″W / 52.655°N 8.686°W / 52.655; -8.686
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Limerick Tunnel
Emergency exit in Limerick Tunnel
LocationLimerick, Ireland, crossing the River Shannon
StartAugust 2006
EndJune 2010
Opened27 July 2010 (27 July 2010)
Toll€2.10 (cars)[1]
Length675 metres (740 yd) (immersed tube tunnel section)
No. of lanesTwo cells of 2 each
Tunnel clearance4.65 metres (15 ft) (external)

The Limerick Tunnel (Irish: Tollán Luimnigh[2]) is a 675-metre-long (2,215 ft),[3] twin bore road tunnel underneath the River Shannon on the outskirts of Limerick city. The tunnel forms part of the N18 Limerick Southern Ring Road. The tunnel is tolled.


Construction was carried out by a consortium of Strabag, John Sisk & Son Ltd, Lagan Holdings Ltd and Roadbridge Ltd.[4] Traffic and Transportation planning was undertaken by Colin Buchannan and Partners. Dredging work for the tunnel trench was carried out by Dutch company Van Oord. The immersion process of floating the tunnel elements out into the Shannon was carried out by another Dutch company, Mergor.

The total cost of construction was €660 million.


Signage on approach to Limerick, indicating tunnel status

A pedestrian open day was held on 19 June 2010, with official opening to traffic by the Taoiseach, Brian Cowen, on 27 July 2010, two months ahead of schedule.[5]


The Austrian EFKON Group commissioned, built and currently operate two toll collection locations, one ten-lane and one six-lane plaza, both staffed.

The tolling locations are both north of the Shannon. One is between junctions 3 and 4 of the N18, and the other is between N18 junction 3 and the Clonmacken Roundabout.[6]

See also[edit]


  1. ^ "Direct Route". Retrieved 2 February 2022.
  2. ^ "Rátaí Dola". eToll. Archived from the original on 4 April 2019. Retrieved 26 January 2020.
  3. ^ "Index". Limerick Tunnel. Archived from the original on 14 May 2010. Retrieved 3 July 2020.
  4. ^ "Limerick Tunnel". Road Traffic Technology. Archived from the original on 3 July 2020. Retrieved 3 July 2020.
  5. ^ "Limerick Tunnel opens to motorists". RTÉ News. 27 July 2010. Archived from the original on 1 November 2010. Retrieved 13 December 2010.
  6. ^ "Limerick Tunnel PPP Route Between M7 Junction 30 and N18 Junction 4" (PDF). Archived (PDF) from the original on 10 December 2019. Retrieved 28 May 2020.

52°39′18″N 8°41′10″W / 52.655°N 8.686°W / 52.655; -8.686