At the chosen point, 3 kilometres (1.9 mi) upstream from Drogheda, the ground level on the south is elevated, with a sudden drop while the north bank slopes gradually down to the river.

The area is environmentally sensitive, especially the reed beds on the north bank and the flora and fauna of Yellow Island in the middle of the river.

It would also look attractive, with a tall pylon at the south side and cable stays fanning out from it, supporting the main structure.

Construction methodology by Richard Hornby & Bruce Ramsay of Cleveland Bridge.

The bridge and motorway are tolled in both directions to finance its construction and maintenance, and to generate profit for Celtic Roads Group.