The new Luas Cross City line is to begin taking passengers in 12 weeks time.
Transport Infrastructure Ireland say driver training has begun, with trams travelling through the city daily.
It says footpaths and kerbs have been reinstated.
The new-look Luas map | Image: Luas Cross City
The Luas Green Line is being extended to Broombridge station in Cabra.
There will be an interchange point at the O'Connell Street (GPO) stop and the current Abbey Street stop between the Green and Red lines.
The Cross City line will become the Green line when it opens.