Kinsale Road Roundabout
Coordinates: 51°52′24.9″N 8°28′12.15″W / 51.873583°N 8.4700417°W The Kinsale Road Roundabout (Irish: Timpeall Bóthair Chionn tSáile), colloquially designated 'The Magic Roundabout', is a five-arm signalised roundabout located approximately 3km south of Cork city centre in Ireland at the junction of the N40 South Ring Road and the N27 South City Link/Airport Road.
The South Ring Road has been constructed on a phased basis since the late 1980s. With the completion of the downstream crossing of the River Lee, the Jack Lynch Tunnel, there was a marked increase in traffic using the road which in turn led to increased delays at the Kinsale Road Roundabout. The South Ring Road is currently a dual-carriageway with a number of at-grade and grade-separated interchanges located along its length.
Recent traffic counts have shown that there are in excess of 85,000 vehicles using the roundabout daily. The straight-through movement between the east and west sides of the South Ring Road was the highest recorded traffic movement at the roundabout and represented approximately 40% of the total traffic using the roundabout. As such, there was an urgent need for grade separation.
In the determination of a preferred scheme solution a number of options were developed and evaluated in terms of environmental impact, safety, constructibility, cost, aesthetics, disruption to traffic during construction and land take. These options included:
...
Wikipedia