At today’s meeting of the Carrigaline Municipal District, we were presented with the promised report on the recent upgrade to the Shannonpark roundabout. Traffic calming measures at the N28/R610 junction were also included in the report.

The nub of the issue here is that Cork County Council had got planning permission through a Part 8 procedure to increase the capacity of the roundabout by providing a slip lane from Carr’s Hill to the N28 eastbound, amongst other measures. But when the project came to be built on the ground, the slip lane was omitted and an additional left-turn-only lane was added on the Carr’s Hill approach to the roundabout instead.

The Council’s report explains that this change arose at detailed design stage to meet the requirements of TII’s latest design advice: to put the planned slip lane in, an additional lane would have been necessary to bring it eastbound along the N28. Merging on a national route (as we do at the Kinsale Road and Sarsfield Road roundabouts) is no longer allowed.

The cost of the work is less than was budgeted. About €660k was budgeted; the cost of the tendered job was just over €510k.

The report and appendices are here: