N11 Motorway Co. Wicklow

Project Road over bridge
Client Wicklow County Council
Stage Complete
Description Design and construction of road over bridge.

Fact File

Structure Matière CM4 64m²/64m² sectional precast concrete arch
Span 10.8m (internal)
Height 7.1m (internal)
Length 75.0m (30 no. Units @ 2.5m wide)


  • Road over bridge.
  • Support 5-6m of earthwork for the road embankment.
  • Preserve access to road for local residents.


  • ABM design allowed for local road to be live during construction to allow access for local residents
  • Installation of arch took 3 days.
  • Earth retaining walls used to achieve required road embankment gradient.
  • ABM also designed and installed earth retaining walls at each end of the structure

The Matiére system was originally developed in France for hydraulic structures in the 1980‘s, since then the system has been developed into a modular range of arch, box and portal frames for a wide range of transport and infrastucture applications. Indeed, some 10,000 structures already exsist worldwide exploiting soil structure interaction to minimise section sizes and allow rapid, cost effective on-site installation with precast units.

ABM hold the licence for the Matiére system in the UK and Ireland.

Click here to view a YouTube video of how ABM construct a bridge in 3 days


Key Personnel

Main Board Directors
Pat O'Neill
Sean Minihane
Brendan O'Neill


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