Dublin needs a MetroLink that should have been completed by now, according to several Lunchtime Live callers.
An Bord Pleanála is hearing discussions and examinations of issues surrounding the transport project over the next five weeks.
One issue that may arise is whether a new connection from the city to Dublin Airport is even necessary.
Miten told Lunchtime Live he thinks the MetroLink simply has to happen.
"The question we've been asking is, 'Is it worth it?' but I think we need to ask the question, 'Is it worth it not to do it?" he said.
"I live in south Dublin and I find it difficult to get to the airport.
"It still takes at least 45 minutes to an hour so it's just too long.
"I could easily take the DART into Tara Street and get the MetroLink into the airport, and that'd be much easier.
"They're saying 53 million passengers in the first year, that's only going to grow.
"I think you have to ask the question can we afford not do it?"
Split-screen image shows an underground Metro train and an artist's impression of a MetroLink station in DublinAnother caller David told the show the project should be even more ambitious.
"If you're going to put some of this underground, I'd be saying get the boring machine and dig your tunnel out as far as Swords," he said.
"Don't take that away, let's start - for example - tunneling alongside the M50.
"So that we have four exit points for the south, west, north and the mid-east going off an underground tunnel to bring traffic off the M50 underground.
"We just don't do these big projects; the Government could and should make a cross-Government decision in the morning [to do this] and set up a body, not for profit, that says, 'We will deliver this'".
The route for the Dublin MetroLinkDublin Commuters Chairperson Feljin Jose said questions over the cost won't be there when it's completed.
"Find me someone in Paris or London who's questioning how much the Metro cost 150 years ago? They won't be," he said.
"No one questions these once the effects are realised.
"We should have built this 20/30 years ago but here we are, the best thing we can do now is just plough on.
"I think there are residents all around Dublin who want to change the route, who want to remove some sections of the route.
"They will have their time to speak over the next couple of weeks".
Image: MetroLinkMr Jose said he feels the frustration of other people.
"I've been following this project since I was nine-years-old, I'm now 27," he said.
"I'm sitting through an oral hearing for something that will be finished in 12 years," he added.
MetroLink consists of a new fully segregated railway, most of which will be underground, between the Swords and Charlemont areas of the capital.
The route will also serve Dublin Airport - the first rail link to the country's largest airport - as well as major educational campuses.
The overall project is expected to cost between €9 billion and €12 billion and is aimed for completion in 2035.
Listen back here:
