Reducing highway carbon emissions is crucial for the transportation industry to achieve sustainable development.This paper explores the relationship between highway carbon emissions and economic growth in Hunan Province based on the Tapio decoupling model and analyzes the factors affecting carbon emissions using the LMDI(Log Mean Dee's Index).The results show that:(1)from 2000 to 2021,the carbon emissions from highways in Hunan Province showed an upward trend,with an aver-age decoupling index of 0.69,and the overall relationship between carbon emissions and economic development is weakly decou-pled.(2)In terms of phases,the weak decoupling relationship dominated from 2000 to 2010,but the stability of decoupling was not high,and strong decoupling and growth connection appeared in some years;from 2018,the overall trend was weak decou-pling-growth connection-weak decoupling.(3)Carbon intensity,and industry size contribute to highway carbon decoupling.Final-ly,recommendations are made for highways to decouple carbon emissions from economic development.
HighwaysTAPIO Decoupling ModelCarbon EmissionsEconomic Development