Road infrastructure is essential for economic and social development, but increasing traffic loads accelerate pavement deterioration and raise maintenance costs. Traditional asphalt production involves high temperatures, leading to significant carbon emissions, high energy consumption, and the use of non-renewable materials. To address these challenges, this study explores the development of a low-emission asphalt mixture using bio-based materials, specifically biochar, as an innovative and sustainable solution. Biochar, produced from biomass waste such as wood residues or agricultural by-products through pyrolysis, supports circular economy principles by transforming waste into a valuable resource and reducing the environmental footprint of construction materials. In this research, two types of biochar - wood biochar and slage biochar - as well as their combinations were used as modifiers for bitumen and as mineral fillers in asphalt mixtures. The results demonstrated that biochar significantly improves the mechanical and rheological properties of bitumen and asphalt mixtures. Modified binders exhibited increased stiffness, higher softening point, and better resistance to rutting while maintaining elasticity at low temperatures, thus reducing the risk of cracking. Mixtures with combined biochars showed the highest tensile strength and minimal rut depth after repeated loading cycles. The use of biochar can reduce greenhouse gas emissions by over 80% due to stable carbon fixation. Overall, biochar-modified asphalt enhances pavement durability, extends service life, and contributes to sustainable, low-emission road construction.