And a new tram/train line with new stations is being built from Cardiff Central, across Callaghan Square, to the Bay.
https://www.railtechnologymagazine.c...ardiff-central
https://tfw.wales/projects/metro/sou...sformation-faq
They are dualling the tracks and building a new Bute Town station right now. In the next few years a new platform will be built at the south of Cardiff Central and the new track will be laid down the service road, across the surface car park and then tramlines through Callaghan Square and then up a ramp to join the newly-dualled Bay Line.
This will enable travellers from wider afield to get off the train at Central and hop on a tram for 5 mins to get to the new arena.
It is a good plan.
A detailed analysis here:
https://swalesmetroprof.blog/2023/01...opes-for-2023/