Abstract
Despite the substantial impact of infrastructure improvement on the global environment, estimation methods have not been established yet. In this paper, a method which measures the environmental load of a unit of road infrastructure is developed by applying the concept of Life Cycle Assessment. Especially, it is indicated both environmental load from infrastructure and that from vehicles running on the infrastructure should be evaluated because road infrastructure improvement influences traffic condition. In addition, the integration with the existing assessment methods of infrastructure improvement impacts is attemped. As a case study, some alternative types of road structure are assessed.
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