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.
Engineering Research Center of Road Transportation Decarbonization, Ministry of Education, Chang'an University, Xi'an, 710064, China.
Environ Monit Assess. 2024 Sep 19;196(10):950. doi: 10.1007/s10661-024-13089-w.
Understanding the CO emission characteristics and key mitigation pathways of intercity passenger transport is crucial for achieving sustainable development in the transport system. Using origin-destination data on travel between city pairs by various transportation modes, we employ the life cycle assessment (LCA) method to estimate route-level CO emissions from intercity multimodal passenger transport corridors, considering infrastructure construction and vehicle operation phases. Subsequently, a sensitivity analysis is conducted to assess the impact of 39 parameters associated with the construction phase, operation phase, and transportation modes on CO emissions from corridors. Trend analysis is employed to explore the future emission mitigation potential for the parameters that have the most significant impact on corridor emissions. Four intercity multimodal passenger corridors in China are selected as case studies. Results indicate that the CO emissions per passenger-kilometer from these corridors exhibit an approximate negative linear relationship with corridor lengths. The proportion of construction-related CO emission intensity of various intercity passenger transport modes varies significantly, ranging from 2.5 to 32.9%. In the medium term, effective emission-mitigation strategies should focus on decreasing private car gasoline consumption in three corridors under 200 km in length, as well as decreasing private car gasoline consumption and promoting clean electricity in the Xi'an-Yan'an corridor. In the long term, efforts should be placed on increasing electric private car share and promoting clean electricity. This study lays a crucial foundation for the refined management of CO emissions from future intercity passenger transport.
理解城际客运的 CO 排放特征和关键减排途径对于实现交通系统的可持续发展至关重要。我们使用城市对之间各种交通方式的出行起点-终点数据，采用生命周期评估（LCA）方法来估算城际多式联运走廊的路线级 CO 排放，同时考虑基础设施建设和车辆运行阶段。随后，我们进行了敏感性分析，以评估与建设阶段、运行阶段和交通方式相关的 39 个参数对走廊 CO 排放的影响。趋势分析用于探索对走廊排放有重大影响的参数的未来减排潜力。选择了中国的四个城际多式联运客运走廊作为案例研究。结果表明，这些走廊的每位乘客公里 CO 排放量与走廊长度呈近似负线性关系。各种城际客运方式的建设相关 CO 排放强度比例差异很大，范围从 2.5 到 32.9%。从中期来看，有效的减排策略应侧重于减少三个 200 公里以下长度的走廊的私人汽车汽油消耗，以及减少私人汽车汽油消耗和促进清洁电力在西安-延安走廊的应用。从长远来看，应努力增加电动汽车的份额并推广清洁电力。本研究为未来城际客运 CO 排放的精细化管理奠定了重要基础。
