UK motorway resurfacing project cuts carbon 50% with hydrogen and electric machinery

FM Conway and National Highways completed a low-carbon resurfacing scheme on the M4 motorway between Junctions 15 and 16, cutting carbon emissions by 50% compared to standard methods. The project used JCB's hydrogen-powered backhoe loader for the first time on a UK strategic road, alongside electric planers and rollers, all transported by an electric lorry. The asphalt mix contained up to 60% recycled material from other highways, and the manufacturing process ran on biogas from anaerobic digestion. The scheme was funded by National Highways' Low Carbon Demonstrator Fund and delivered over six weeks. Techniques like echelon paving and laser profiling improved road durability and reduced future maintenance needs. The project saved 630 tonnes of CO2 equivalent total, with over 400 tonnes coming from recycled asphalt and biogas alone. This real-world demonstration shows how combining multiple low-carbon technologies can work at scale on high-traffic infrastructure.