Abstract
The road maintenance has great influence on traffic operation and environment in many aspects from the perspective of life cycle assessment (LCA). To clarify this problem, LCA of road network infrastructure maintenance phase while considering traffic operation and environmental impact is researched in this paper. Firstly, the evaluation objective, quantification method and evaluation content for LCA are determined. Then, a list of factors related to road network infrastructure maintenance cost is categorized as fixed and variable costs. The relationship between evaluation results and maintenance scale is established. Quantitative models are established for the evaluation of maintenance management and traffic operations in the maintenance phase of road network infrastructure. Besides, the impact of maintenance activity on maintenance management and traffic operations is explored. The effects of different maintenance durations and traffic control types on traffic condition are investigated. It is found that there is a significant scale economy effect in maintenance costs, which provides a calculation basis for optimizing maintenance strategies. This research improves the analysis method for the LCA of road network infrastructure maintenance phase while considering traffic operation and environmental impact, which provides an important reference and guidance for the efficient and low-carbon operation of road network infrastructure.
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