Study of Carbon Sequestration and Soil Health Impacts within Highway Earthworks

Devon County Council (DCC), is delivering the A382 Link Road Development near Newton Abbot, Devon. In addition to the main scheme, additional funding has been made available through the ADEPT Live Labs 2: Decarbonising Local Roads programme to fund carbon reduction measures on the project. The scheme seeks not only to improve highway safety, network resilience and traffic flow, but also to demonstrate innovative approaches to reducing and removing carbon emissions from highway construction activities. As part of the project's carbon-negative aspirations, DCC wishes to investigate the impact of construction activities on soil carbon levels and the potential benefits of incorporating biochar, enhanced mineral weathering and mycorrhizal fungi into traditional highway earthworks operations. Emerging research suggests that these products may increase carbon sequestration rates, improve soil health and increase long-term carbon storage within highway verges and associated landscape areas. The budget available is between £150,000 and £170,000 further details on the cost strategy are given in the documentation.