The Luas Cross City is due to open to passengers in Dublin in 12 weeks.
Transport Infrastructure Ireland said the driver training phase has begun with trams travelling through the city daily.
Footpaths and kerbs have been reinstated, with new granite paving and carriageways being resurfaced.
The construction on the new 5.9km route involved extending the Green line and creating an interchange with the Red line.
There will be 13 new stops, with eight of them in the core city centre area.
It will take 21 minutes to travel the 5.9km from Broombridge station to St Stephen’s Green.
It is expected the Luas Cross City project will create between eight and ten million extra Luas trips annually, while reducing the annual number of private car journeys by one million.
