Analysis of Transportation-Related Carbon Emission Research Hotspots and Development Trends Based on CiteSpace and VOSviewer

Transportation-related carbon emissions are a hot area of research in the world today. This paper collected existing literature in the field of transportation carbon emissions from the Web of Science core dataset from 2005 to 2021. The research status, hot research topics, and the development trend of transportation-related carbon emissions were reviewed based on CiteSpace and VOSviewer from the aspects of national collaboration, institutional collaboration, author collaboration, journal sources, keywords, and literature co-citation. The main conclusions and contributions: (1) Since the Paris Agreement, the heat of transportation-related carbon emissions research has increased rapidly, China, the United States, the United Kingdom, and Germany as major contributors, however, the partnership between countries, institutions, and authors is not close enough. (2) The focus of research has changed from environmental benefits and energy substitution to electrified transportation and intelligent path design. (3) The research framework of transportation-related carbon emissions was developed from energy, transportation tool, regional emission, and epidemic event, and the clustering terms in the co-citation of the literature were categorized and analyzed according to the keywords they contained, to refine the research progress and trends in the field of transportation-related carbon emissions. Finally, we propose some suggestions for future research, hoping to provide more references for subsequent researchers.