LAST UPDATE | 11 Dec 2025

GREEN LINE LUAS services are “back operating normally” this evening. 

Services had been suspended on the line since yesterday as the result of a power failure.

Green Line trams “gradually resumed’ service from 6pm this evening, with Transport for Ireland this evening confirming that the service is now operating normally. 

“We apologise for any inconvenience caused,” they added. 

Until this afternoon, operators Transdev had said they were unable to give an estimated time for trams to resume but that repair work was continuing.

Green Line services back operating normally following the power outage. We apologise for any inconvenience caused.

— Luas (@Luas) December 11, 2025

At around 4.30pm, it was confirmed services would resume across the full span of the line – from Bridesglen on the southside to Broombridge on the northside of the Liffey – from 6pm.

Meanwhile, Red line services are operating as normal.

Luas operator Transdev has apologised to the travelling public for the impact of the service disruption.

Transdev said that it wants to “reassure customers and the public that maintenance teams and engineers will remain on site as services return to normal operations”.

It added that engineers have “worked around the clock to address the issue within the 48-volt safety circuit system, which caused the Green Line power failure”.

Engineers identified that the fault lay within a “critical low-voltage safety system known as the 48-volt system”.

Luas said this is not connected to the overhead lines that power the trams but instead forms part of the safety network linking substations to the Central Control Room, allowing power to be safely monitored and controlled across the line.

“In simple terms,” said Transdev, “this system is designed to cut power to the overhead lines in an emergency.

“It was detecting a fault condition and, for safety reasons, prevented full power restoration until Luas engineers resolved that condition.”

Commuters have shared the frustration and time pressures they have faced over the past 24 hours as the Luas was suspended.

Many have reported having to work from home or wait longer for buses to bring them in to work or home yesterday evening.

‘Poorly served’ for public transport

Labour’s transport spokesperson Ciaran Ahern said the “chaos” facing commuters is an example of how “poorly served” the capital is for public transport.

“If one issue arises, commuters are plunged into chaos on their morning trip with no communication or information made available to them,” the Dublin South-West TD said.

“It’s incredible that over 24 hours after its breakdown, people still don’t know when the Luas will be back in operation.”

Ahern added:

The fact that one Luas line going down can cause such havoc around the city is indicative of how poorly our capital city is served by public transport.

Sinn Féin’s transport spokesperson Pa Daly said clarity is urgently needed.

“This has been causing massive disruption to businesses and commuters in our capital city over the past two days,” he said.

“Transdev have claimed a major power outage is to blame, but at the same time have said they just don’t know when it will be back up and running.

“That is not good enough. Substantial amounts of public money are awarded for these contracts. Therefore, a certain level of service should be expected.

“I understand that technical issues can and do happen and service suspensions are sometimes necessary, especially where safety is concerned.

“However, at the very minimum commuters and businesses need to know when they can expect the service to be back up and running,” Daly concluded.

With reporting by Eoghan Dalton