A Senator says she can't see any reason to delay the Metro North project out to 2034.
Local representatives and campaigners are demanding the Government sets out the plans for DART+ and Metro North.
It follows reports the projects could be delayed for a number of years.
They were due to be completed by 2027, but now may not be ready until between 2032 to 2034.
The plan was first officially announced and financed in the 'Transport 2021' plan back in 2005.
Fine Gael Senator Regina Doherty says the timeline shouldn't be pushed out.
"It's 30 years ago: there are people who are living in Swords - all along the tracks right up to Dublin North in Balbriggan - who bought their houses or apartments with Metro North as part of their sales brochure.
"And here we are now, finding from a leak yesterday in the Mail on Sunday, that this project is not going to be delivered until 2034.
"And it's not acceptable".
Senator Doherty says she e-mailed Transport Minister Eamon Ryan on Sunday for clarity.
"What we need now is clarity from the Minister... I e-mailed him yesterday.
"So not only am I looking for a public statement, I'm looking for a meeting with all of the Oireachtas members on behalf of the citizens who this is going to affect to make sure that we can ensure that it either stays on track - or if there are issues, that we tease through those issues to get it back on track".