The increasing use of recycled materials in asphalt pavements calls for environmental assessment of such key impacts as the energy and CO2 footprint. Relevant life cycle assessment (LCA) resources worldwide are reviewed and the knowledge gap for the road industry is identified. An LCA model for pavement construction and maintenance that accommodates recycling and up-to-date research findings was developed. Details are provided of both the methodology and data acquisition. The model as applied to an asphalt paving project at London Heathrow Terminal-5, in which natural aggregates were replaced with waste glass, incinerator bottom ash (IBA) and recycled asphalt pavements (RAP). Production of hot mix asphalt and bitumen were found to be energy intensive processes. The LCA model can be further tested and calibrated as a decision supporting tool for sustainable construction in the road industry. For the covering abstract see ITRD E157233