National Highways trials low-carbon resurfacing on M5 with electric equipment and modified binder

National Highways is testing low-carbon construction methods on the M5 Huntworth Viaduct in Somerset as part of a resurfacing project. The trial uses electric paving machinery, sprayers, and welfare facilities instead of diesel equipment, alongside a specially modified binder meant to extend road lifespan and reduce future maintenance emissions. The work is done with contractor FM Conway and follows earlier low-carbon trials on the M5 and M4. If successful, these techniques could inform future highway maintenance across the UK strategic road network. The project is part of National Highways' broader push to decarbonize construction while keeping road performance and durability intact. Overnight closures are scheduled through mid-July and later in summer for resurfacing and road marking.