Characteristics of life-cycle carbon dioxide emissions of arterial highway maintenance and the influencing factors  

作　　者：Yao WANG Yuan-Qing WANG Shu-Juan JI Si-Jia SUN Shu-Hong MA Ya-Nan GAO 

机构地区：[1]Key Laboratory of Transport Industry of Management,Control and Cycle Repair Technology for Traffic Network Facilities in Ecological Security Barrier Area Chang'an University,Xi'an 710064,China [2]Guangzhou Aids to Navigation Office,Southem Navigation Service Center,Maritime Safety Administration,Guangzhou 51000,China

出　　处：《Advances in Climate Change Research》2024年第4期751-765,共15页气候变化研究进展（英文版）

基　　金：The authors thank the following for their financial support:the National Natural Science Foundation of China(51878062,72361137003);the Natural Science Foundation of Shaanxi Province,China(2020JM-246);the Fundamental Research Funds for the Central Universities of China,CHD(300102210214,300102343520).

摘　　要：With the focus of highway development transitioning from construction to maintenance,a comprehensive understanding of the characteristics and influencing factors of carbon dioxide(CO_(2))emissions from highway maintenance activities is crucial for formulating effective strategies to promote the low-carbon development of road infrastructure.However,the quantitative relationships between CO_(2) emissions from highway maintenance schemes and factors such as pavement deterioration,traffic volume,and road grade remain unclear owing to a lack of compre-hensive,multi-category,and real data.Using real maintenance data from 340 arterial highway segments in China,this study conducts the life cycle assessment(LCA)to estimate CO_(2) emissions from maintenance activities and examines the primary emission sources among various structural layers and materials.Furthermore,multiple linear regression(MLR)analysis is conducted to investigate the impact of traffic volume,road grade,and pavement deterioration on CO_(2) emissions from maintenance projects,and factors influencing the early-stage degradation of pavement performance.The results demonstrate that average CO_(2) emissions from heavy rehabilitation projects are 6.97 times higher than those from medium rehabilitation projects.Emissions from heavy rehabilitation projects exhibit a significantly negative linear relationship with the riding quality index(RQI)before maintenance(p<0.05),and emissions from medium rehabilitation projects show a significant negative linear relationship with the pavement condition index(PCI)before maintenance(p<0.05).Emissions from heavy and medium rehabilitation projects are significantly positively correlated with heavy vehicle traffic volume before maintenance(p<0.05).Moreover,the early-stage degradation of PCI after heavy rehabilitation and RQI after medium rehabilitation exhibit significantly negative linear relationships with their respective in-dicators before maintenance(p<0.05).The early-stage degradation of RQI after heavy rehabilitation is

关 键 词：Life cycle assessment(LCA) Arterial highway Maintenance Emission factor Pavement performance Traffic volume 

分 类 号：X321[环境科学与工程—环境工程]