绿色道路运输管理与环境可持续性：人口密度的影响
Green road transportation management and environmental sustainability: The impact of population density.
作者信息
Din Ashraf Ud, Ming Jian, Rahman Imran Ur, Han Heesup, Yoo Sunghoon, Alhrahsheh Rakan Radi
机构信息
School of Transportation and Logistics, Southwest Jiaotong University, Chengdu 610031, China.
Center for Trans-Himalaya Studies Leshan Normal University, China.
出版信息
Heliyon. 2023 Sep 1;9(9):e19771. doi: 10.1016/j.heliyon.2023.e19771. eCollection 2023 Sep.
The objective of the study is to examine the moderating role of population density in the relation between road transportation and environment sustainability of South Asian countries from 1990 to 2014. The study uses environment sustainability (population density) as the outcome (moderator), whereas road infrastructure, road density, energy intensity and transportation energy consumption are explanatory variables. The selection of these variables is motivated by their significance in understanding the relationship between road transportation and environmental sustainability. Road infrastructure and road density capture the physical aspects of transportation systems, while energy intensity and road transportation energy consumption provide insights into the energy efficiency and environmental impact of road transport, respectively. The findings show that a positive impact of road infrastructure and road density exists on environmental sustainability. There is contrarily a negative effect of road transportation energy consumption and energy intensity on environmental sustainability. Population density also harms environmental sustainability. When population density is used as a moderator between road transportation energy consumption, energy intensity and environment sustainability, it increases the coefficients of both energy intensity and road transportation energy consumption, which shows that population density plays an enhancing role between road transportation energy consumption, energy intensity and environment sustainability. The coefficients of road density and road infrastructure changed into a negative from a positive in the presence of population density as a moderator, which states that population density plays an antagonistic role between road density and environmental sustainability. We recommend prioritizing sustainable transportation solutions and policies in densely populated areas. Implementing measures such as promoting public transportation and electric vehicles, and investing in infrastructure that supports active transportation modes like cycling and walking can help mitigate the negative environmental effects of transportation while addressing the challenges posed by population density.
该研究的目的是考察1990年至2014年期间人口密度在南亚国家道路运输与环境可持续性之间关系中的调节作用。该研究将环境可持续性（人口密度）用作结果（调节变量），而道路基础设施、道路密度、能源强度和运输能源消耗则为解释变量。选择这些变量是因为它们在理解道路运输与环境可持续性之间的关系方面具有重要意义。道路基础设施和道路密度体现了运输系统的物理方面，而能源强度和道路运输能源消耗则分别提供了有关道路运输的能源效率和环境影响的见解。研究结果表明，道路基础设施和道路密度对环境可持续性有积极影响。相反，道路运输能源消耗和能源强度对环境可持续性有负面影响。人口密度也对环境可持续性有害。当将人口密度用作道路运输能源消耗、能源强度与环境可持续性之间的调节变量时，它会增加能源强度和道路运输能源消耗两者的系数，这表明人口密度在道路运输能源消耗、能源强度与环境可持续性之间起增强作用。在人口密度作为调节变量的情况下，道路密度和道路基础设施的系数从正值变为负值，这表明人口密度在道路密度与环境可持续性之间起拮抗作用。我们建议在人口密集地区优先考虑可持续交通解决方案和政策。实施诸如推广公共交通和电动汽车，以及投资支持自行车和步行等主动交通模式的基础设施等措施，有助于减轻运输对环境的负面影响，同时应对人口密度带来的挑战。
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