A new Luas line to Finglas is being designed.
It would continue on the cross-city from Broombridge over the Tolka Valley.
The map is expected to be announced mid-next year, with a public consultation phase then expected to begin.
Luas extensions tend not to be expensive, and they tend to be relatively easy pieces of infrastructure to complete, compared to a brand new Luas line or a Metro line," said Fine Gael TD Noel Rock who made the announcement earlier.
"I'd be reasonably optimistic that it won't be a particularly expensive project. And I would be reasonably optimistic that once it starts it would be completed in a reasonably short space of time."
