Exploring the Determinants of Travel-Related CO₂ Emissions Considering Spatial Heterogeneity

Urban transportation significantly contributes to greenhouse gas emissions, with CO₂ emissions from urban travelers varying across different regions. Identifying the determinants of residents’ travel-related CO₂ emissions (TCE) from a spatial perspective is significant for formulating effective carbon reduction strategies. However, limited research explores the spatial heterogeneous relationship between TCE and its determinants. In this study, the authors focus on Guiyang, China, as a representative city and adopt Traffic Analysis Zones (TAZ) as geospatial units of analysis to capture regional differences in CO₂ emissions. By analyzing data from the 2021 Guiyang resident travel survey, they measure per capita CO₂ emissions and reveal that in Guiyang, each person emits 599.42 g of CO₂ during their travels. Furthermore, the authors apply a semiparametric geographically weighted regression model to investigate the spatial nonstationarity of the variables’ impact on TCE. The findings reveal that local variables have heterogeneous effects on TCE across different TAZs. For example, while the Huaxi district in southern Guiyang shows a negative correlation between TCE and the proportion of low-income individuals, most regions in Guiyang exhibit the opposite trend with a positive correlation. In the northern regions of Guiyang, such as Kaiyang and Xifeng, the proportion of car ownership negatively impacts TCE, contrasting with conclusions drawn from other regions. Moreover, the results of geographical variation tests indicate that sociodemographic attributes exhibit greater spatial heterogeneity in their influence on TCE, in contrast to built environment attributes. These results provide valuable theoretical support for policymakers in designing location-specific, low-carbon transportation policies, with significant implications for advancing sustainable transportation development.

• Record URL:
  • https://doi.org/10.1061/JTEPBS.TEENG-8413
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/24732907
• Supplemental Notes:
  • © 2024 American Society of Civil Engineers.
• Authors:
  • Liu, Yang
  • 0000-0001-7863-9371
  • Zeng, Mihan
  • He, Mingwei
  • Shi, Zhuangbin
  • 0000-0002-4379-7203
• Publication Date: 2024-11

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 04024075
• Serial:
  • Journal of Transportation Engineering, Part A: Systems
  • Volume: 150
  • Issue Number: 11
  • Publisher: American Society of Civil Engineers
  • ISSN: 2473-2907
  • EISSN: 2473-2893
  • Serial URL: http://ascelibrary.org/journal/jtepbs

Subject/Index Terms

• TRT Terms: Carbon dioxide; Exhaust gases; Heterogeneity; Spatial analysis; Urban transportation; Urban travel
• Geographic Terms: Guiyang (China)
• Subject Areas: Environment; Highways; Planning and Forecasting;

Filing Info

• Accession Number: 01934221
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: Oct 17 2024 10:22AM