Over 80,000 music fans will make their way to Slane Castle this afternoon to see the US rockers Kings of Leon take to the stage.
The gates open at 1pm, with the first band set to perform at 1.30pm.
Gardaí are advising people to take public transport where possible.
A full list of services can be checked at the Bus Éireann and Dublin Bus websites.
The full line-up is:
13:30 THE WHIGS
15.45 WHITE LIES
17.00 THIN LIZZY
Followed by KINGS OF LEON