The company that runs the LUAS in Dublin is being called on to introduce longer trams and more frequent services as a matter of urgency.
It's after a tram broke down on the green line for the second day in a row today, leading to major delays.
Fine Gael Senator Neale Richmond says the carriages are too packed, and people waiting on platforms are watching full trams pass by.
He says "the breakdowns, we're hearing - 'technical faults', you know one of the trams yesterday had to stop because someone fainted because it was so overcrowded - if you have a tram stopped on the line for 2 - 3 mins that can lead to half an hour delays further back".
