It connects the N25 road and M11 motorway, providing a link running east-northeast through County Wexford, between New Ross and Enniscorthy.

Wexford County Council started using the Trunk Road designations, internally at least, by June 1925.

The road was constructed on the embankment of the former Macmine Junction to New Ross branch railway line, which had closed in 1963.

[11] On 18 July 2019, 4 km of dual carriageway road were officially opened as part of the M11 Gorey to Enniscorthy PPP Scheme.

There are suspended plans for the future N30 Moneytucker to New Ross, a proposed 14.4 km road improvement that is to realign most of the current road and to provide a southern bypass of Clonroche, to be constructed between the eastern end of the New Ross Bypass near Corcoran's Cross Roundabout and the western end of the N30 Moneytucker to Jamestown Scheme.