【目的】量化道路交通标线的碳排放。【方法】基于生命周期评价（LCA）方法，从材料生产、施工建造和养护维修 3个阶段建立道路交通标线碳排放的生命周期清单数据库。采用 SUMO仿真软件量化标线养护维修阶段的交通延误碳排放，形成完整的碳排放量化框架与核算模型。通过上述数据库和核算模型对比分析水性和热熔型道路交通标线的碳排放量。【结果】水性道路交通标线碳排放总量为 288. 62 kgCO2e/（100 m²），呈现“养护维修 >施工建造 >材料生产”的排放特征，其中养护维修阶段占比 62. 73%，且以交通延误排放为主。热熔型道路交通标线碳排放总量达 854. 66 kgCO2e/（100 m²），材料生产与养护维修阶段碳排放分别占比 43. 41%和 43. 36%，各阶段碳排放显著高于水性道路交通标线。【结论】实现对道路交通标线的碳排放量化，开发快速开放交通的标线材料是降低水性道路交通标线碳排放的有效途径。

［Objective］This study aims to quantify the carbon emission of road traffic markings.［Methods］ Using the life cycle assessment（LCA）method，a life cycle inventory database was established for the carbon emission from road traffic markings，from covering the stages of material production，construction and maintenance. The SUMO simulation software was used to quantify thecarbon emission from traffic delay during the maintenance stage of road traffic markings，thereby forming a complete carbon emission quantification framework and accounting model. The carbon emission of waterborne road traffic marking and hot melt road traffic marking were compared and analyzed based on the above database and accounting model.［Results］The total carbon emission of waterborne road traffic marking was 288. 62 kg CO2e/（100 m²）. Emissions follow the pattern： “maintenance（62. 73%）>construction>materials production”，with traffic delay emissions being thepredominant source during the maintenance stage. The total carbon emission of hot melt road trafficmarking was 854. 66 kg CO2e/（100 m²），and the carbon emission of the material production andmaintenance stage accounting for 43. 41% and 43. 36% respectively. Carbon emissions at each stagewere significantly higher than for waterborne marking.［Conclusion］ This study established a framework for quantifying the carbon emissions of road traffic markings. The results indicated thatdeveloping rapid-opening traffic marking materials is an effective approach to reducing the carbonemissions of waterborne road traffic markings.