The emerging trend of converting abandoned elevated infrastructure into linear parks: state of the arts and categories of intervention

This study focuses on converting abandoned elevated transportation infrastructure into high-quality, pedestrian-oriented public spaces. To discuss planning implications, we categorized the outcomes of various projects into typologies. This practice may be a trend; however, it remains scarcely understood, depriving planning professionals of adequate tools to assess the potential and adequacy of conversion. By tracing its origin within the history of linear parks and green corridor planning, we discuss the general conversion of abandoned transportation infrastructure and the transition to elevated parks as the outcome. Subsequently, considering the existing studies on this genealogy, we defined three typologies of elevated parks according to an interconnected understanding of their connectivity, design, location, and functions. By reviewing the elevated parks within this genealogy and providing a framework for this typological study, we offer a reference for planners to accurately interpret and use this planning practice to design public spaces.