Billy Joel to perform only European gig in Cardiff
The M4 motorway is expected to be very busy, Cardiff council has warned.
Event day parking, available between 08:00 and 00:00, is being offered for a fee at the civic centre.
A park and ride service is being operated by the council between Leckwith and Fitzhammon Embankment, opposite the stadium.
Transport for Wales said it would be providing additional capacity on rail routes in and out of Cardiff.
Great Western Railway said it would be putting on extra trains to get people home from the concert in the evening.