Limerick Tunnel

The Limerick Tunnel (Irish: Tollán Luimnigh^[2]) is a 675-metre-long (2,215 ft),^[3] immersed tube tunnel^[4] 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.

Limerick Tunnel

Emergency exit in Limerick Tunnel
Overview
Location	Limerick, Ireland, crossing the River Shannon
Route	N18
Start	August 2006
End	June 2010
Operation
Opened	27 July 2010 (2010-07-27)
Toll	€2.30 (cars)[1]
Technical
Length	675 metres (740 yd) (immersed tube tunnel section)
No. of lanes	Two cells of 2 each
Tunnel clearance	4.65 metres (15 ft) (external)

Construction

Construction was carried out by a consortium of Strabag, John Sisk & Son Ltd, Lagan Holdings Ltd and Roadbridge Ltd.^[5] 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.

Opening

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.^[6]

Tolling

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.^[7]

See also

• Jack Lynch Tunnel, on the N40 southern ring road of Cork
• Dublin Port Tunnel
• Atlantic Corridor, ongoing construction of major roads along the west side of Ireland
• Roads in Ireland