Further research into problems with Dublin's LUAS tracks has reportedly found that extensive repairs are needed to ensure the long-term safety of the tram system.
Reports this morning said the study was commissioned by the company that built the tracks after problems emerged with the bonding material beneath the tracks.
Other studies uncovered by the media have already revealed that this material is beginning to crack and will need to be repaired in the coming years.
The Railway Procurement Agency has been playing down the problem, saying the construction company will have to bear the full cost and the repairs will not cause major disruption for LUAS users.
However, this morning's reports said the latest study warns that simple track fastenings will not be enough to rectify the situation and new concrete supports will have to be manufactured to a very high standard.