Somerset's M5 improvement project earns global recognition for innovation and sustainability

A major highways improvement scheme at M5 Junction 26 has received international recognition after being named one of the world's leading infrastructure projects for excellence in delivery and collaboration.

The Chelston Link reconstruction project, delivered by Heidelberg Materials UK, AECOM and Somerset Council, claimed the Project Excellence and Innovation Award at the prestigious NEC Martin Barnes Awards, beating high-profile international competition including Hong Kong's £5 billion Trunk Road T4 project and the UK's first all-electric prison, HMP Millsike.

The scheme involved replacing a deteriorating concrete carriageway on the Junction 26 roundabout and adjoining A38 link road while incorporating a range of lower-carbon construction techniques to minimise environmental impact and reduce disruption.

Councillor Richard Wilkins, Somerset Council's Lead Member for Highways and Transport, said the award reflected what could be achieved through strong collaboration between the public and private sectors, delivering lasting benefits for local communities.

Tim Doyle, Somerset Framework Manager at Heidelberg Materials UK, added that close partnership working enabled the team to introduce innovative materials and construction methods that reduced the project's carbon footprint while reopening the key motorway junction significantly ahead of schedule.

The latest accolade adds to a growing list of honours for the project, which was previously shortlisted for the Best Highways Decarbonisation Award at the Decarbonising Transport Awards 2026 and also received a commendation for innovation at the CIHT South West Awards, recognising its contribution to more sustainable and efficient highways delivery.