Trams will be operating on the new Luas Cross City Line this June for a test run before it officially launches in December.
The test run will last between 12 and 14 hours, so that engineers can examine the performance of trams on the new tracks.
Speaking to Independent.ie, a spokeswoman for Luas Cross City said,
"In mid-June, there will be a gauge run. We will run a tram from St Stephen's Green at walking pace, with people from Transdev (the operator), the contractors, gardaí and Dublin City Council running diagnostics".
Having started in 2013, the new Luas line will add 13 new stops to Dublin's light transportation system, eight of which in the city centre, and will have costed €368 million by completion.
The Luas Cross City is set to officially launch in the first half of December.