The design standards for the scheme are set out in the National Roads
Authority's Design Manual for Roads and Bridges (the NRA DMRB). The
standard for the new road, in accordance with the NDP, will be either:
- Standard Grade Separated Dual 2 Lane (7.0m) Carriageway (NRA
DMRB Category 5A)
or Standard Dual 2 Lane (7.0m) Motorway (NRA DMRB Category 7B)
Both categories have the same cross-section. During the route corridor
investigations larger than minimum horizontal radii were used wherever
possible. However, scattered ribbon development and other constraints
throughout the Study Area meant that radii were restricted in many
places.
