Mark Kilcullen

Mark Kilcullen

Irish Rail
Finglas, Dublin


Roughan & O’Donovan designed this scheme to eliminate a level crossing along the Maynooth railway line and relieve traffic congestion for road users at the crossing.


Our design solution involved closing the existing level crossing; constructing a 70m long single span steel truss bridge crossing; and making provision for traffic, cycle and pedestrian facilities along 500m of the realigned Ratoath road.

We succeeded in:

  • Reducing the visual impact of the bridge by minimising the height of approach embankments
  • Complementing the industrial heritage of Dublin’s rail network by achieving a truss form with our bridge design
  • Minimising operational risk to the railway by facilitating offline assembly
  • Maximising commercial land to the north by using reinforced earth embankments
  • Relieving road traffic congestion with our revised signalised arrangement of the Ballyboggan Road junction


  • The Royal Canal, as a proposed Natural Heritage Area (pNHA)
  • Built up nature of the site
  • Close proximity of residential dwellings 

Services provided:

  • Engineering consultancy
  • Environmental engineering consultancy
  • Bridge design
  • Site supervision
  • Contract administration
  • Project Supervisor Design Process