Mark Kilcullen

Mark Kilcullen

Iarnród Éireann
Lead Consultant


DART+ West is the first phase of the DART+ Programme, which aims to significantly increase capacity on all the rail corridors serving the Greater Dublin Area. DART+ West will electrify the Maynooth Line, which runs from Spencer Dock and Connolly Station in Dublin city centre to M3 Parkway and Maynooth to the west. It will also increase the current passenger capacity of 4,500 per hour to 13,200 per hour in 2025.

Roughan & O’Donovan and IDOM are acting as multidisciplinary design consultants on the project. Working together with Iarnród Éireann’s delivery team, we delivered the option selection stage, and we are now developing the design, Environmental Impact Assessment and Railway Order for the project.

The Railway Order application is expected to be submitted to An Bord Pleanála in the summer of 2022 and, subject to receipt of the necessary planning and funding approvals, construction will commence in 2024.

Key infrastructural improvements

  • Approximately 40km of electrification and re-signalling of the Maynooth and M3 Parkway lines to the city centre
  • Capacity enhancements at Connolly Station, including modifications to junctions, to facilitate increased train and passenger numbers
  • Provision of a new station at Spencer Dock to better serve the north Docklands area and improve the interchange with the Luas
  • Closure of level crossings and provision of replacement bridges where required
  • Construction of a new DART depot facility west of Maynooth for the maintenance and parking of trains
  • Interventions at existing bridges over the rail line where insufficient clearances for overhead electrification equipment exist
  • Substations, electrical buildings and all other civil and ancillary works necessary to accommodate the project


By delivering an integrated, electrified, fast and reliable rail service, DART+ West will:

  • enhance public transport opportunities for work, education and leisure purposes
  • facilitate the future growth and development of existing and new communities 
  • alleviate road congestion
  • build a sustainable and connected city region
  • support the transition to a low carbon and climate resilient society
  • encourage a move away from private cars to a reliable, efficient and safe public transport network 
  • improve multimodal transport connectivity through interchange with the Luas at Broombridge and the proposed Spencer Dock Station and with the proposed Metrolink at Glasnevin/Phibsborough

Services provided:

  • Option selection
  • Design of level crossing replacements
  • Bridge design
  • Traffic impact assessment
  • Environmental Impact Assessment
  • Appropriate Assessment
  • Flood Risk Assessment
  • Planning and railway order
  • Stakeholder engagement

Learn more about our work on public transport projects