Abstract Many young adults are susceptible to obesity issues and the increased health risks associated with a lack of physical activity. Those who are prone to gaining weight include university students. An active transport system (walking and cycling), in combination with well-funded public transport, are essential components of a sustainable urban transport network, offering many benefits to the health of the individual, as well as the environment, economy, and society as a whole. The spatial association between active mobility (i.e. the physical activity of a human being for locomotion) of young adults and the environment, however, is poorly understood. This study presents a GIS-based model to determine association of various environmental (natural and built environment) factors with locational accessibility of active and public transport trips taken by university students. A GIS-based ensemble of Frequency Ratio (FR) and the Analytical Hierarchy Process (AHP) model was established. We analysed the characteristics of locations accessed by university students in relation to eight environmental factors including slope, elevation, land use, population density, travel time, building density, intersection density, and public transport service area. The model was applied to the Grenoble metropolitan region of France, an area well-known for policies which promote active transport. The results indicated that intersection density and land use are strongly associated with active and public transport accessibility, with weights of 0.17 and 0.16, respectively. The presence of infrastructure to support active travel, and regulation to limit vehicular speed, also improved accessibility. Approximately 50% of the area of the Grenoble metropolitan region was defined as accessible and suitable (‘moderate’ to ‘very high’ degree) for active mobility. The results of this study could allow city planners to monitor the existing status of active and public transport facilities, and identify areas that require additional work to improve accessibility.

中文翻译：

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一种基于 GIS 的方法来评估环境对大学生主动和公共交通可达性的影响

摘要 许多年轻人容易受到肥胖问题的影响，而且缺乏体育锻炼会增加健康风险。容易发胖的人包括大学生。积极的交通系统（步行和骑自行车）与资金充足的公共交通相结合，是可持续城市交通网络的重要组成部分，为个人健康以及环境、经济和社会带来许多好处整个。然而，年轻人的主动移动性（即人类为运动而进行的身体活动）与环境之间的空间关联知之甚少。本研究提出了一个基于 GIS 的模型，以确定各种环境（自然和建筑环境）因素与大学生主动和公共交通出行的位置可达性之间的关联。建立了基于GIS的频率比(FR)和层次分析法(AHP)模型的集合。我们分析了与坡度、海拔、土地利用、人口密度、出行时间、建筑密度、交叉口密度和公共交通服务区等八个环境因素相关的大学生访问地点的特征。该模型被应用于法国格勒诺布尔大都市区，该地区以促进主动交通的政策而闻名。结果表明，交叉口密度和土地利用与主动和公共交通可达性密切相关，权重分别为 0.17 和 0.16。支持主动出行的基础设施和限制车辆速度的法规的存在也提高了可达性。格勒诺布尔大都市区大约有 50% 的区域被定义为适合（“中等”到“非常高”程度）进行主动流动。这项研究的结果可以让城市规划者监控活跃和公共交通设施的现有状态，并确定需要额外工作以改善可达性的区域。格勒诺布尔大都市区大约有 50% 的区域被定义为适合（“中等”到“非常高”程度）进行主动流动。这项研究的结果可以让城市规划者监控活跃和公共交通设施的现有状态，并确定需要额外工作以改善可达性的区域。格勒诺布尔大都市区大约有 50% 的区域被定义为适合（“中等”到“非常高”程度）进行主动流动。这项研究的结果可以让城市规划者监控活跃和公共交通设施的现有状态，并确定需要额外工作以改善可达性的区域。