The surrounding environment presents a number of engineering constraints that would have significant implications on the complexity of work, timing, and costs.
There are a number of geotechnical challenges to consider, such as the existing slope hazard, earthquake-induced slope failure risk, and liquefaction potential.
The coastal environment, tidal levels, and flood risk present constraints and risks.
We also need to consider the existing infrastructure and underground services in the road corridor, such as wastewater and telecommunications. You can find more information on the environmental constraints in the supporting documents.