Dublin
With racing at Leopardstown on Saturday afternoon expect traffic around Leopardstown and Foxrock to be heavier than usual.
Several roads around the Phoenix Park will be closed for the Annual Motor Races on Saturday and Sunday.
Chesterfield Avenue will be closed from the Castleknock Gate to the Phoenix Monument between 7 a.m. and 7 p.m. both days. Upper Glen Road, Whitefields Road, Castleknock Gate and Black Road, between Whitefields Road and Cabra Gate, will close.
Knockmaroon Gate and Road and Survey Road, between Mountjoy Cross and the junction with Furze, will be closed from 7 p.m. tonight until 7 a.m. Monday.
Warrenhouse and Bal doyle Roads will close at the level crossing 11 p.m. Friday to midnight Sunday. ESB works continue on the South Circular Road until tomorrow, and it is best to avoid the area.
Davitt Road is closed to inbound traffic and is one-way out of town from Suir Bridge to Naas Road junction. Inbound traffic from the M50 should use the Lucan Road or divert via the Longmile Road from the Naas Road.
Meath
Work has begun on the R154, the Trim-Dublin road, at Tullaghmedan, and there is a single-lane traffic system.
Cork
Cornmarket Street is one-way north between Castle Street and Kyle Street until the end of July. There is no access to Kennedy Quay from Albert Quay.
Tipperary
A race meeting at the Tipperary Racecourse on Sunday afternoon is expected to cause delays on the N24 and in Tipperary town. There is a single-lane, stop-go system at Inane on the N7 on the Nenagh side of Roscrea until the end of July.
Aer Rianta
Over 213,000 passengers are expected to pass through Dublin Airport this weekend. Around 1,600 flights will take off and land, and an extra 350 charter flights, mostly for sun holidays, have been added to the normal schedule.
Aer Rianta advises passengers to use the long-term Blue car-park which can be reached by using Exit 4 off the M50 at the Ballymun interchange. There are shuttle buses between the car-park and the passenger terminal.
Iarnrod Eireann
There will be extra trains running from Cork, Galway and Sligo to Dublin for this weekend's GAA All-Ireland qualifiers in Croke Park. Details at local stations.
Bus Eireann
Bus Eireann is running a normal service this weekend.
Road Deaths
Fifteen people have died in road accidents this month, bringing to 202 the total killed so far this year.
Road traffic information supplied by AA Roadwatch