A737 Dalry Bypass
North Ayrshire, Scotland, UK · 2017–2019 (opened to traffic) · £34.7 million
The judgement call
Account-gated at launchThe bypass significantly improved road safety and reduced congestion within Dalry town centre. - The project included the construction of a major viaduct, a key engineering feature. - Early engagement and planning were crucial for managing the interface with the railway and river. - The scheme was part of a wider effort to improve the A737 corridor.
Key engineering challenges
Constructing a new bypass to the east of Dalry, separating local and strategic traffic. - Building a significant viaduct over a live railway line and river, requiring careful planning and execution. - Managing complex ground conditions and environmental considerations in the area. - Ensuring minimal disruption to existing transport networks during construction.
Project facts
- Client / owner
- Transport Scotland
- Lead contractor
- Farrans Construction
- Lead designers
- Fairhurst (involved in Civil, Geotechnical, Environmental design)
- Project type
- new build
- Scale
- 3.8 miles (6.1 km) of new single carriageway with overtaking lanes; 250m viaduct over Glasgow to Ayr Railway line and River Garnock.
- Disciplines
- civil; structural; geotechnical; environmental; transport planning; landscape and urban design
- Standards & frameworks
- NEC; DMRB; CDM Regulations (Scotland)
Sources: Transport Scotland (https://www.transport.gov.scot/projects/a737-dalry-bypass/) - Farrans Construction (https://www.farrans.com/project/a737-dalry-bypass/) - Fairhurst (https://www.fairhurst.co.uk/project/a737-dalry-bypass/)