All traffic drives on the left in Ireland.

 

Motorways

Roundabouts

By law, drivers must enter a roundabout by turning to the left. Drivers must treat the roundabout as a junction and give right-of-way to traffic already on it (coming from the right). If the driver is unfamiliar with driving on the left hand side of the road, roundabouts may pose a particular risk (the driver should take extra care).