Driver training for the new line has is underway
The new Luas Cross City line will open to passengers in 12 weeks time, according to Transport Infrastructure Ireland (TII).
This would see the line operate from December 15th.
TII say the driver training phase has commenced with trams travelling through the city daily.
It says footpaths and kerbs have been reinstated, with new granite paving and carriageways being resurfaced.
The Luas Green Line is being extended to Broombridge station in Cabra.
There will be an interchange point at the new O'Connell Street (GPO) stop and the current Abbey Street stop between the Green and Red lines.
The line will have 13 new stops, with eight of these in core city centre area.
It will take 21 minutes to travel the 5.9km from Broombridge station to St Stephen’s Green.
The project is costing €368m - one of the largest capital investment projects being undertaken by the Government.
The Cross City line will become the Green line upon completion.