Glasgow M8 Woodside Viaduct roadworks to remain until 2026 - five years on from start date

Glasgow's M8 Woodside Viaduct roadworks are to remain until 2026 - as cost expectations for the temporary measures have soared to £152 million.

Transport Scotland has revealed further misery for commuters as plans to prop up parts of the busy motorway being further delayed. Work on the project to install the supports for the viaducts began in 2021 with completion expected last year.

However, due to the complexity of the work it was delayed until November this year. Now transport chiefs have admitted that work to re-open the lanes could take until 2026 - five years after closing.

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The Woodside Viaducts were constructed between 1969 and 1971 with widening work taking place in 1990. Both carriages are supported by viaducts, which consist of 25 piers of different heights and orientations.

Transport bosses say that water ingress and winter salt treatment have damaged support beams leading to structural concerns over the volume of traffic which use the road. The temporary propping up system was planned to take load from the existing structure so traffic could return, and allow repair work to the existing supports.

Structural damage
Structural damage -Credit:Transport Scotland

However, the project has been delayed due to the 'complex' nature of designing and building 23 bespoke sections. Bosses say that the project has also been hit with increased building and construction costs due to supply chain issues.

Contractors hope that the eastbound carriageway could open as early as summer 2025 with the project now expected to cost between £126-£152 million.

Structural damage
Structural damage -Credit:Transport Scotland

Transport Scotland’s Director of Major Projects, Lawrence Shackman said: "The M8 Woodside Viaducts are a vital element of Scotland’s motorway network, carrying 150,000 vehicles daily.

“Our Principal Contractor, Amey, has been delivering this highly complex work on behalf of Transport Scotland while ensuring this busy section of the M8 motorway remains open.

“The ongoing temporary propping works are challenging due to the varying ground conditions and site constraints, including the presence of a plethora of public utilities as well as the Glasgow subway underground tunnels.

“Once the structure is fully propped, lane restrictions on the M8 can be removed.

“The construction programme expects the eastbound viaduct lane restrictions to be removed in summer 2025, followed by the removal of the westbound viaduct lane restrictions in early 2026.”

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