Dart to Wicklow timeline left exposed as PAC hears fallout from failed rail signalling project

By Hugh O'Farrell Walsh, The Wicklow People

The future of the long promised Dart extension to Wicklow town was left hanging in the balance last week after senior transport officials told the Public Accounts Committee (PAC) that Ireland’s rail capital plan will have to be “rephased and reprioritised” in the wake of the National Train Control Centre failure.

While the National Transport Authority (NTA) insisted that current signalling works will protect the wider Dart+ programme, it stopped short of reaffirming the 2029 target for extending electrified commuter rail south of Greystones.

When Wicklow TD John Brady pressed the NTA on whether the DART+ Coastal South project remained on track for 2029, NTA chief executive Anne Shaw did not repeat the date. Instead, she said only that the resilience signalling project now under way would ensure “no impact on the Dart+ service”.

That reassurance applies to the overall programme, not specifically to the Wicklow element, which remains at an earlier stage of development than the northern and western Dart+ corridors.

The committee spent much of the session examining the collapse of the traffic management system contract, which has already resulted in a €50 million write‑down and will require a replacement system to be procured.

Ms Shaw confirmed that the NTA will now have to assess “additional funding requirements” for rail signalling and control systems, and that this will have consequences for the sequencing of future rail projects. “We will have to look at it across the whole portfolio,” she said, adding that the authority would need to “reprioritise certain things” once the full cost of the replacement system is known.

For Wicklow, that creates a clear risk. Dart+ Coastal South is the least advanced of the Dart+ corridors, with no railway order lodged and no construction procurement under way. The NTA did not provide any update on design progress, business case development or timelines for statutory approvals.

Nor did it indicate whether the 2029 target remains achievable. The absence of any fresh commitment stood out in a hearing where officials repeatedly emphasised the need to protect projects already in procurement or construction.

The only direct reference to Wicklow came when Deputy Brady asked whether the county’s electrification remained on schedule.

Ms Shaw’s response focused solely on the resilience works, which are designed to prevent the existing Dublin signalling system from becoming obsolete before DART+ expansion. Those works do not advance the Wicklow extension itself; they simply ensure that the wider network can accommodate future growth.

The NTA has commissioned an independent review of the failed signalling project, due to report in September.

That review, along with the authority’s reassessment of the rail capital envelope, will determine how quickly the replacement traffic management system can be delivered and what impact it will have on the rest of the investment programme.

Only then will it become clear whether Wicklow’s long-awaited Dart extension can proceed on its current trajectory, or whether the county will once again find itself waiting for electrification that has been promised for more than a decade.