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Abstract:Motivated by the need to address challenges of global climate change, this study develops and implements a project
based life cycle framework that can be used to estimate the carbon footprint for typical construction work-items
found in reconstruction, rehabilitation and Capital Preventive Maintenance (CPM) projects. The framework builds
on existing life cycle assessment methods and inventories. The proposed framework considers the life cycle
emissions of products and processes involved in the raw material acquisition and manufacturing phase, and the
pavement construction phase. It also accounts for emissions due to vehicular use and maintenance operations during
the service life of the pavements. The framework also develops and implements a method to calculate project level
construction emission metrics. Finally, the research provides a web-based tool, the Project Emission Estimator (PE-
2) that can be used to benchmark the CO2 footprint of highway construction projects. In conclusion, the research
suggests ways of implementing the proposed framework within MDOT to help reduce the CO2 footprint of highway
construction projects.
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