The Red Cow interchange is a major road junction in west

Dublin Dublin (; , or ) is the capital and largest city of Republic of Ireland, Ireland. On a bay at the mouth of the River Liffey, it is in the Provinces of Ireland, province of Leinster, bordered on the south by the Dublin Mountains, a part of th ...

Ireland Ireland ( ; ga, Éire ; Ulster Scots dialect, Ulster-Scots: ) is an island in the Atlantic Ocean, North Atlantic Ocean, in Northwestern Europe, north-western Europe. It is separated from Great Britain to its east by the North Channel (Grea ...

on the M50, meeting the N7 Naas Road (to

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and

Limerick Limerick ( ; ga, Luimneach ) is a western city in Ireland situated within County Limerick. It is in the province of Munster and is located in the Mid-West which comprises part of the Southern Region. With a population of 94,192 at the 2016 ...

) at a free-flow grade-separated junction which incorporates a tram line. The N7 route commences at this junction, junction 1 on the N7 and junction 9 on the M50, and the ''Naas Road'' from the city centre via

Inchicore Inchicore () is a suburb of Dublin, Ireland. Located approximately west of the city centre, Inchicore was originally a small village separate from Dublin. The village developed around Richmond Barracks (built 1810) and Inchicore railway works (b ...

to the Red Cow interchange comprises part of the R110 and the R810. The junction is the busiest road junction in

. Before a recent upgrade, it frequently had tailbacks several kilometres long on the routes leading to it.

Original configuration

Opened in 1990 as part of the M50 Western Parkway project, the junction was originally a grade-separated interchange from the point of view of M50 travellers; h