Abstract Greenways are linear green spaces that are widely incorporated as policy instruments to address various urban issues. Heterogeneity is observed among the forms, functions, and activities of greenways. However, a number of studies have viewed urban greenways as homogeneous landscape features despite the increasing heterogeneity of urban greenways caused by transportation development. Taking the “three-legged stool” concept as a theoretical starting point, this article develops a conceptual framework for understanding the heterogeneous landscapes of urban greenways. The framework is then applied to empirical work in Shenzhen. This study shows that traffic impact, corridor width and land use are crucial factors in determining the heterogeneity of urban greenways and resolving the conflicts that result from the overemphasis on the transportation function of greenways. These factors also determine the primary benefits of greenways and differentiate various types of greenways. Based on field observations and empirical data, we identify four types of greenways in Shenzhen: transport greenways, forest greenways, park greenways and rural greenways. Greenways in Shenzhen have apparent heterogeneity in recreational attractiveness due to the surrounding landscape and external interference. Furthermore, the majority of Shenzhen greenways are nonmotorized transportation infrastructure with narrow corridors of street greenery. The composition and heterogeneity of greenways in Shenzhen are the result of the “one-size-fits-all” approach to greenway typologies and planning activities, which has become a challenge for multipurpose greenway planning in urban environments. Future efforts should place more emphasis on the heterogeneous landscapes of urban greenways in order to develop improvement strategies associated with specific policy goals.

中文翻译：

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深圳城市绿道异质景观：交通影响、廊道宽度与土地利用

摘要 绿道是线性绿色空间，被广泛用作解决各种城市问题的政策工具。在绿道的形式、功能和活动之间观察到异质性。然而，尽管交通发展导致城市绿道的异质性越来越大，但许多研究将城市绿道视为同质景观特征。本文以“三足凳”概念为理论出发点，构建了理解城市绿道异质景观的概念框架。然后将该框架应用于深圳的实证工作。这项研究表明，交通影响，廊道宽度和土地利用是决定城市绿道异质性、解决因过分强调绿道交通功能而产生的矛盾的关键因素。这些因素也决定了绿道的主要效益，区分了各种类型的绿道。根据实地观察和实证数据，我们确定了深圳四种类型的绿道：交通绿道、森林绿道、公园绿道和农村绿道。由于周边景观和外部干扰，深圳的绿道在休闲吸引力上存在明显的异质性。此外，深圳的大部分绿道都是非机动交通基础设施，街道绿化走廊狭窄。深圳绿道的组成和异质性是绿道类型和规划活动“一刀切”的结果，这已成为城市环境中多用途绿道规划的挑战。未来的努力应更加重视城市绿道的异质景观，以制定与特定政策目标相关的改进策略。