THE LUAS will only run a late-night service on the Green Line over the Christmas period with no extra services on the Red Line to Tallaght.
Councillors on the South Central Area Committee of Dublin City Council have written to Luas as a result to demand an "equal service" over the festive season.
The Green Line service from St Stephen's Green to Sandyford and Bride's Glen will operate until 3.30am on certain nights over the holidays.
The Red Line runs through areas such as Fatima, Rialto and as far as Tallaght but won't have any additional services past the usual midnight service from the Point in the city centre.
"If you are going to run a public service it has to be equal. If there are two lines then the two lines should run late," Indpendent Cllr Paul Hand told the Herald.
He believes that the discrepancy amounts to discrimination against the people who live in areas around the Red Line.
"The citizens in our area are being discriminated against economically, by paying €10 or €20 (on taxis) at the end of a night out, to get home," he said.
"It'd be better if these citizens were able to spend that money on Christmas presents for their family or in a pub or restaurant in town."
However, Luas have rejected the suggestion that the lack of late-night services on the Red Line is discrimination.
"There is absolutely no bias on our behalf, but what there is, is substantial evidence that there is just not enough demand for the service on the Red Line," a spokesperson said.
The company said that it tested late-night trams on the Red Line but the carriages were empty, adding that if demand were to increase, additional services would be considered
Night Luas trams will run every half hour from 1am until 3.30am on the Green Line on Friday and Saturday nights between December 12 and 31.
Meanwhile, Irish Rail enlisted models Pippa O'Connor and Karena Graham to launch its Christmas late-night service on the DART.
Later DART trains will operate from the city centre to Howth and Greystones while other trains will serve stations in North County Dublin, Drogheda and Dundalk on the nights of December 12, 13, 19 and 20 as well as New Years Eve.
Details of the times are on Irish Rail's website.
Separately, An Bord Pleanala has granted planning permission for a northbound Luas stop on Dawson Street.
The Rail Procurement Agency had previously only been granted approval for a southbound stop.