At the gate of Ariel House, take a right onto Lansdowne Road
At the Crossroads, take a left onto Shelbourne Road.
At the top of Shelbourne Road you can only turn left, so keep in the outer right hand lane, this lane will take you directly into the filter lane for turning right onto Anglessa Road.
Follow Anglessa Road until you approach a roundabout at Donnybrook Church. You need to get in the left hand lane, closest to the church; this is a filter lane for turning left onto the N11.