It follows reports the projects could be delayed for a number of years.
The two projects were due to be up and running by 2027.
But construction on these may not begin until that date, according to the Mail on Sunday.
It highlights 2032 as a completion date for the Dart Plus extension, and 2034 at the earliest for MetroLink.
Irish Farming Could Face 'Cliff Edge' With One In Three Farmers Planning Exit
Wicklow's "Irish Viking" Disqualified From Driving for Six Years
Wicklow Whiskey Tariff Relief A 'Gamechanger' For Local Distillers
Teacher Shortage Solution Comes To Wicklow Schools
Hospital Parking Charges Under Fresh Review As Brady Demands Action