Design development
Since the announcement of the preferred route for the Long-Term Solution (LTS) the project team have been undertaking further design development work as part of the DMRB Stage 3 Assessment, including:
- Refinement of the A83 carriageway alignment
- Design of the B828 Glen Mhor local road junction
- Development of the debris flow shelter and protection wall design
- Refinement of the geotechnical aspects of the design, including further geohazard and rock-fall modelling
- Development of the proposals to minimise the impact on the environment, informed by various environmental surveys and field work
- Development of the proposals to mitigate impacts on the water environment, including sustainable drainage proposals
- Consideration of construction methodology to minimise disruption to road users during the construction phase
- Consideration of the proposals for the Rest and Be Thankful Car Park and Viewpoint
Design Manual for Roads and Bridges (DMRB) Process
DMRB Stage 1 (Completed April 2021)
Strategic assessment and identification of a preferred route corridor.
DMRB Stage 2 (Completed June 2023)
Route option assessment and identification of a preferred route.
DMRB Stage 3 ( In progress)
Development and assessment of preferred option.
Statutory Process
Publication of draft Orders and Environmental Impact Assessment Report - not yet started.
Procurement
Not yet started.
Construction
Not yet started.
Typical Large Scale Infrastructure Project Timeline
- DMRB Stage 1 - 1-2 years
- DMRB Stage 2 - 1.5-2 years
- DMRB Stage 3 - 1.5-2 years
- Statutory Process - 1-2 years (Subject to need for Public Local Inquiry)
- Procurement - 1 year (Subject to procurement route)
- Construction - currently estimated 3-4 years