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Introduction
Publications
Publications (19)
By asking how much street length can be reached from a given origin within a specified distance limit, and by defining distance in different ways as a function of the physical or cognitive effort required to move in cities, the analysis of reach produces measures that effectively characterize street density, connectivity, and the associated urban p...
Estimating health outcomes at a neighborhood scale is important for promoting urban health, yet costly and time-consuming. In this paper, we present a machine-learning-enabled approach to predicting the prevalence of six common non-communicable chronic diseases at the census tract level. We apply our approach to the City of Austin and show that our...
Dockless e-scooter sharing, as a new shared micromobility service, has quickly gained popularity in recent years. In this paper, we present a practical approach to estimating e-scooter flow patterns without knowing the actual routes taken by the e-scooter riders. Our method takes advantage of a huge open dataset that contains the origins and destin...
The patterns of syntactic differentiation and their causes and effects are fundamental to space syntax analysis. Often, however, differentiation is taken for granted with no reference to the dynamic process that brings it about. Here, we first show that by measuring the amount of syntactic differentiation, we can better distinguish between types of...
The shape and distribution of the most integrated streets, collectively called the integration core, is critical to the characterization of local and global street network types in the space syntax literature. The description of the shape, position, and distribution of integration cores relative to the underlying street networks, however, has remai...
The COVID-19 pandemic caused significant changes in day-today mobility patterns. Much research has revealed the socioeconomic disparities in travel behavior during the pandemic, focusing on the differences between different socioeconomic groups. By contrast, relatively little research has been done to explore the potentially different responses to...
Modeling spaces and their relationships is at the core of syntactic analysis, including reach analysis. In a syntactic model, two spaces can be described as close together or far apart based on the directional distance between them. In this study, we compare three different ways of measuring directional distance—namely, by number of steps, by numbe...
Unequal living conditions is a core challenge in contemporary societies and addressed in the Sustainability Development Goals. It is argued that unequal living conditions create and reproduce urban segregation. Having good access to different resources is especially critical for disadvantaged groups. One way of increasing the understanding of urban...
With a population of some 6 million inhabitants (as of 2020), Berlin-Brandenburg is set to become a model metropolitan region for the twenty-first century. Bringing together resilient response to climate change, regional circular economies and dense urban development, any proposal for the region's future needs to respect its identity while keeping...
Syntactic types are defined as sets of designs with particular properties. We are specifically interested in the definition of deformed grids, a particular type of street network internal to superblocks. The superblocks under study are surrounded by arterial streets and have traversing local main streets and internal street infills. The argument ta...
Superblocks, defined as larger urban areas surrounded by arterial streets, emerge as organizing units of urbanism in many parts of the world. We compare different morphologies of superblock design from the point of view of the diversity of urban conditions that they engender, including land uses and the scale of experiences. We identify an emerging...
Peponis, Bafna, and Zhang (2008) proposed three measures of street connectivity—metric reach, directional reach, and directional distance—to evaluate the potential of access to individual road segment in a given street network. A Java program has already been developed at Georgia Tech as an ArcGIS plug-in for calculating the above measures. Althoug...
阐明了四条有关城市规划与设计的原则:第一,应使人们日常交往和相处的公共空间遍布全
城,以此构建公开透明的社会;第二,应营造通达且易于理解的街道网络,从而引导人们对城市的探索
和认知,并促进城市多元文化的共存;第三,应使位于城市整体或局部地区中心的居民出行目的地之间
相互联系,且以较为连续的方式分布,使其在决定前往某个目的地时,能同时意识到周边潜在的其他去
处;第四,在不破坏整体和局部街网连接性的前提下,应合理穿插连接不同空间尺度的街道。上述原则
的提出均建立在多年的研究基础上。30多年来空间句法领域的研究成果表明,影响空间认知的句法变量
与影响人车流运动、土地利用分布等城市功能的句法变量之间是相互关联的。
We advance four principles for planning and...
The paper discusses the relationship between the syntax of street networks and the differentiation of the
size of urban blocks in a sample of small towns and settlements. The argument is in four parts. In the first
part it is demonstrated, through design games, that the differentiation of streets by integration is linked to
the differentiation of b...
A particular kind of street network is examined, where strong differentiation between scales of syntactic
structure is evident: supergrids of primary roads, with inserted local streets. Computational formulae are provided to describe simple regular systems and clarify the nature of the syntactic differentiation of scales. The focus is on the linear...
The morphological evolution of Macau has been typically characterized as the extension of its city boundaries and the implementation of different urban planning traditions. However, few studies on the urban morphology of Macau employ a consistent spatial analysis to relate the morphological variation at the city level to their effects at the street...