Alain Chiaradia

Alain Chiaradia
The University of Hong Kong Faculty of Architecture HKUrbanLabs · Department of Urban Planning and Design (DUPAD) Centre of Urban Studies and Urban Planning (CUSUP)

BArch MArch ENSAM AA GDip GC Econ (Distinction)

About

111
Publications
43,348
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648
Citations
Introduction
Front end Megaproject outcomes evaluation. Urban Reference Class have high non linearity. Combining Structure Equation Modeling (SEM) - Seemingly Unrelated Regression (SUR) with predictive Artificial Neural Network (ANN) Extreme Case Study - Lantau Tomorrow, Hong Kong, Island Reclamation in Central Water. https://authors.elsevier.com/a/1dh4DyDvMI9ZL Related to Flyvbjerg's iron law of Megaprojects: https://towardsdatascience.com/the-iron-law-of-megaprojects-18b886590f0b
Additional affiliations
July 2016 - present
The University of Hong Kong
Position
  • Professor (Associate)
January 2010 - June 2016
Cardiff University
Position
  • Professor (Associate)

Publications

Publications (111)
Technical Report
Full-text available
Configuration spatiale et mixité sociale urbaine, HILLIER Bill, CHARADIA Alain, University College London - Laboratoire Space Syntax mars 2005, 191 p., cartes, fig., graph., tabl., bibliogr., PUCA 739 « the lack of a global view on the interrelationships between exclusion and poverty on the one hand [and] transport system on the other hand … is th...
Article
Full-text available
Informal economy (IE) activities contribute significantly to the contemporary urban dynamic. Multifaceted and prolific studies of IE are nearing 50 years. The concept of IE exists in diverse forms with discussion from different perspectives from a vast intellectual landscape. However, there is a lack of systematic review of IE literature knowledge...
Article
Full-text available
Route choice, wayfinding behaviour and pedestrian movement pattern research relies on objective spatial configuration model and analysis, to quantify and control route choice and wayfinding complexity/difficulty for 3D indoor and outdoor multi-level buildings and urban built environments (IO-ML-BE). Our contribution is to compare the interaction of...
Article
Route choice, wayfinding behaviour and pedestrian movement pattern research relies on objective spatial configuration spatial model and analysis, to quantify and control route choice and wayfinding complexity/difficulty for 3D indoor and outdoor multi-level buildings and urban built environments (IO-ML-BE). Our contribution is to compare the intera...
Article
An outline strategic urban planning vision is a front-end government strategic plan with sparsely defined goals. Methods for an ex-ante appraisal of such sparsely defined vision are limited in the literature. By adapting a reference class forecasting (RCF) methodology, we propose an innovative two-stage combination of Structural Equation Modeling (...
Chapter
Urban informality and infrastructure planning (UIIP) are global phenomena. Studies in urban informality are nearing 50 years with diverse research strategies to resolve the threat of infrastructure availability and quality to urban development. Information technology and artificial intelligence in humanities, social sciences and environmental scien...
Research Proposal
Full-text available
1. In Asia and China, @ sub city level and neighbourhood level, there is a lack of research* on the relationship between climate change preparedness, liveability, wellbeing, sustainable transport, and Built Environment (BE) dimensions such as high, and extremely high density, in particular around TOD service areas. This note review a set of review...
Chapter
Full-text available
From Dublin to Santiago de Compostela, you will travel along from the western edge of Europe. Great discoveries repelling the margins of the old continent, at the pioneer ports of crossings transatlantic to the emblematic pilgrimage routes, you will follow the spray, taking advantage of some interior escapes, to the rhythm of the waves of time. Car...
Article
Full-text available
Professional urban design education in universities usually involves teaching students techniques in how to do research but less often, what the role of research is in design, whether in their student or future professional work. This is not for a lack of theorising about the relationships between research and design. For example, a well-known fram...
Article
Full-text available
From "Transit", "Oriented", and "Development" dimensions, this paper measured the TOD performance of 95 MTR stations in hyper-dense city Hong Kong. With the support of multi source big data, 15 indicators were selected and measured, quantifying the degree of TOD performance for each station. Using the hierarchy classification method, MTR station ar...
Article
Full-text available
TOD Theory and MTR's "rail + property" development strategy has driven the development of Hong Kong's new towns. To improve the efficiency of rail transit and residents' travel, the pedestrian network in new towns is extended from walking at the same level with vehicles to a multi-level pedestrian networks. By conducting a typology study to compare...
Article
Full-text available
Predicting how changes to the urban environment will affect town centre vitality, mediated as pedestrian flows, is important for environmental, social and economic sustainability. This study is a longitudinal investigation of before and after urban environmental change in a town centre and its association with vitality. The case study baseline is C...
Experiment Findings
Full-text available
Visual Graph Analysis (VGA) A visual introduction to the metrics
Preprint
Full-text available
Wayfinding behavior and pedestrian movement pattern research relies on objective spatial configuration representation and analysis, such as space syntax, to quantify and control for the difficulty of wayfinding in multi-level buildings and urban built environments. However, the space syntax's representation oversimplifies multi-level vertical conne...
Conference Paper
Full-text available
Challenges in good urban life: High density city and volumetric urban design Liveability and well being
Article
Transit Oriented Development (TOD) has become an urban planning and design policy and practice approach to deliver sustainable transport through the world. TOD as infrastructure contributes to urban liveability in determining way of life and well-being of the inhabitants of a city. Urban liveability can be understood as a perceived notion of well-b...
Presentation
Full-text available
Setting the scene: Grand Paris Express How to better understand the impacts of urban design? Research interest: How do we measure urban design at macro, meso, micro scale? To relate to impacts - economic, social (including health), environmental To figure out whether it matters or not? Typical URN layout GPE GPE 2009-2014 Theoretical elabora...
Article
Full-text available
Scientific studies have long demonstrated how economic activities regularly distribute themselves within a city in response to geographical centrality. Following the growing interest in network geography in understanding urban dynamics, rather than measuring centrality (accessibility) by a priori knowledge of central business district (CBD) locatio...
Article
Full-text available
Spatial Design Network Analysis (sDNA) is a toolbox for 3-d spatial network analysis, especially street/path/urban network analysis, motivated by a need to use network links as the principal unit of analysis in order to analyse existing network data. sDNA is usable from QGIS & ArcGIS geographic information systems, AutoCAD, the command line, and vi...
Conference Paper
Full-text available
Despite the extensive use of positioning and navigation in outdoor space, indoor positioning and navigation systems, essential for intelligent building and smart city services, are unsatisfactory in either performance or price, sometimes in both. This paper analyzes and compares the performances and prices of existing indoor positioning technologie...
Article
The role of the built environment in improving public health through fostering physical activity has come under increased scrutiny in recent years. This study investigates relationships between walking activity and the configuration of green spaces in Greater London. Pedestrian activity for N = 54,910 walking trip stages is gathered through the Lon...
Chapter
Full-text available
LIVEABILITY VERSUS DENSITY IN HONG KONG Hong Kong’s economic position has been driven in the last decades by a high density land development model relying on a mass transit network combined with a real estate value-capture system. This high-rise living model raises questions of liveability, social equity and resilience. The Hong Kong 2030+ Plan req...
Conference Paper
Full-text available
The walkability of pedestrian paths serves as an urban semantic infrastructure for the global smart city development. However, traditional methods cannot fulfill the task of personalized walkability assessment on (i) automation of assessment, (ii) the level of details, and (iii) meeting the personalized demands of pedestrians (e.g., with a wheelcha...
Conference Paper
Full-text available
Hong Kong, as an outlier city, has 7.5 million inhabitants over 250 sq km is a representative of very high-density, transit-dominated city with strong planning power (i.e., full ownership of land) and about 45% of the population living in public housing. In this paper, an exploratory cross-sectional analysis investigates the impact of multi-modal a...
Presentation
Full-text available
A longitudinal network analysis of the urban rail network (URN) of Shanghai 1995-2020 (Closeness and Betweenness). The analysis shows that the URN grows into a standard configuration and that the configuration evolution keep reinforcing the main centrality - it is conjectured that while there is decentralization of residential there is the re-centr...
Technical Report
Full-text available
This report has been produced to assist the Alta team during the creation of the Berkeley Pedestrian Master Plan (Appended at the end of the report). It uses a series of scientific analyses to provide a quantitative, predictive perspective for the City of Berkeley, combining Space Syntax’s network science indicators methodology with years of experi...
Article
Full-text available
Many studies have been made on street quality, physical activity and public health. However, most studies so far have focused on only few features, such as street greenery or accessibility. These features fail to capture people’s holistic perceptions. The potential of fine grained, multi-sourced urban data creates new research avenues for addressin...
Article
Full-text available
This entry provides a general overview of urban morphology, covering the contributions of the three pioneering schools: Italian, British, and French. An overview of the main theoretical traditions is followed by a discussion of the fundamental shift in focus that sees the linking of urban morphology to impacts and a corresponding change in methodol...
Conference Paper
Full-text available
Is density related to liveability? In what way? The measure of density / the perception of density – have we got the right density measure? The governance of density – the urban design dimension of planning density of the most liveable city Liveability is conceptually multi-dimensional and seems complex to define / measure / compare Density is conc...
Article
Full-text available
Predicting how changes to the urban environment will affect town centre vitality, mediated as pedestrian flows, is important for environmental, social and economic sustainability. This study is a longitudinal investigation of before and after urban environmental change in a town centre and its association with vitality. The case study baseline is C...
Article
Full-text available
The new crowdedness Major cities in China are building and expanding metro systems as a strategy to improve sustainable mobility and reduce the negative environmental and social consequences of fast-paced motorization. In China, 33 cities have a metro network, and metro systems are currently under construction in 16 additional cities with many more...
Conference Paper
Full-text available
As metro systems become more extensive they also become more complex, an analysis of the network shape and structure can be of substantive help for planners at early design stages to effectively evaluate multiple alternatives. This study compares the design scenarios of adding a typical circular ring metro line versus a novel alternative using two...
Article
In rapidly developing countries where master plans quickly lead to new cities, planning professionals still lack a robust methodology for the appraisal of land use at the proposal stage. This research proposes a novel approach to master-plan appraisal based on examining whether the relationship between the planned land use pattern and the proposed...
Article
Full-text available
China is seeking to prohibit the construction of any new gated communities and to gradually open existing schemes after three decades of growth of large-block gated estates. In this article, we use permeability analysis to explore the 'what if?' question posed by the policy: what if gated communities became permeable? We ask the question in respect...
Article
Transit users may achieve the recommended amount of daily physical activity solely by walking to and from transit stations. However, there are few objective assessments of the configuration and quality of walking environments of the station approaching routes in high density built environments. This problem is acute in many developing countries and...
Article
Full-text available
Since 2000, research into the value of urban design has been utilised in consultancy and policy-making with regard to understanding the value of public investment. This research informs an emerging approach to teaching urban design appraisal within a MA urban design studio, in which variations of the residual method are deployed to assess developer...
Technical Report
Full-text available
Maison Blanche XIII one of the 68 new stations of the Grand Paris Express (GPE). GPE Urban Observatory (UO) - APUR – translated from French. Knowledge and detailed analysis to characterise the areas in which the future stations will be located in the conurbation and monitor their subsequent development. The UO enable better understanding of the urb...
Technical Report
Full-text available
Vert de Maisons one of the 68 new stations of the Grand Paris Express (GPE). GPE Urban Observatory (UO) - APUR – translated from French. Knowledge and detailed analysis to characterise the areas in which the future stations will be located in the conurbation and monitor their subsequent development. The UO enable better understanding of the urban...
Technical Report
Full-text available
Bagneux M4 one of the 68 new stations of the Grand Paris Express (GPE). GPE Urban Observatory (UO) - APUR – translated from French. Knowledge and detailed analysis to characterise the areas in which the future stations will be located in the conurbation and monitor their subsequent development. The UO enable better understanding of the urban fabric...
Article
Full-text available
Since 2000, research into the value of urban design has been utilised in consultancy and policy-making with regard to understanding the value of public investment. This research informs an emerging approach to teaching urban design appraisal within a MA Urban Design studio, in which variations of the residual method are deployed to assess developer...
Conference Paper
Full-text available
In this paper we present three dimensional models of pedal cycle networks, based on open data (Open Street Map) and analysed with sDNA. sDNA is both a methodology and a GIS/CAD freeware plug-in for the analysis of spatial networks, compliant with international network standards. sDNA is underpinning the research that won the 2014 RTPI award for ex...
Chapter
Full-text available
Between 1993 and 2013, the high-capacity metro network of Shanghai has expanded rapidly and played a major part in the sustainable public transportation system. In this short period, the major change in accessibility introduced by the metro system kept pace with massive increase in population and land use intensification and diversification of the...
Conference Paper
Full-text available
We compare the structural properties of the street networks using the Ordnance Survey Integrated Transport Network (ITN) of four areas in Inner London. We investigate the properties of the geometry of the network, its density, resident and workplace density and a set of centrality measures. Traditionally, centrality measures have been instrumental...
Article
Full-text available
There is now a substantial body of research suggesting that social cohesion, a collective characteristic measured by the levels of trust, reciprocity and formation of strong social bonds within communities, is an important factor in determining health. Of particular interest is the extent to which factors in the built environment facilitate, or imp...
Conference Paper
Full-text available
Using axial map representation, space syntax research has found that spatial configuration analysis correlates with patterns of the movement flows. “Intelligibility” a second order measure, defined as the correlation between connectivity and global integration has been proposed as a necessary condition for such correlates to occur i.e. when such co...
Article
Full-text available
The objective of this research is to determine the role of urban street layout design in the process of shaping property values. The effect of spatial accessibility on rent is a classic finding of spatial economics. Using space syntax finegrained spatial design analysis, which indexes the spatial centrality and accessibility, the patterns of proper...
Article
Full-text available
The objective of this research is to determine the role of urban street layout design in the process of shaping property values. The effect of spatial accessibility on rent is a classic finding of spatial economics. Using space syntax fine-grained spatial design analysis, which indexes the spatial centrality and accessibility, the patterns of prope...
Article
Full-text available
In recent years spatial economics has focused on the spatial location of economic activities and its determinants. At the city-region level, a significant part of the analysis has been concerned with the concept of agglomeration as a source of economies of scale, productivity growth and the role of transport: The spatial accessibility economies. Us...
Article
Full-text available
In recent years spatial economics has focused on the spatial location of economic activities and its determinants. At the city-region level, a significant part of the analysis has been concerned with the concept of agglomeration as a source of economies of scale, productivity growth and the role of transport: the spatial accessibility economies. Us...
Article
Full-text available
The digital revolution has enabled an influx of data that has allowed us to analyse cities in ways that could never previously be anticipated. How, though, might this data be constructively applied in a manner that could shape and improve not only urban patterns, but also people's economic and social prospects? Alain Chiaradia looks at how space sy...