The €660 million Limerick Tunnel is set to open at the end of July.
The tunnel is part of the Southern Ring Road Phase 2 development which connects the M7 Dublin and M20 Cork roads with the N18 to Galway and Shannon airport.
When open to traffic it is expected to take 18,000 vehicles out of Limerick city centre daily with a projection
of 40,000 motorists using the tunnel by 2020.
