Urban renewal is an ideal approach to promoting the value of the urban fabric and improving the sustainability of the urban environment. This study, which shows the continuity of research on sustainable urban renewal, aimed to identify sustainable urban renewal literature based on a library analysis of scientific research since 2000. A total of 3971 scientific papers from the SCIE (Science Citation Index Expanded) and SSCI (Social Sciences Citation Index) databases were reviewed to examine how research concerning “sustainable urban renewal” has emerged and developed in the past 20 years. The h-indices and impact factors of the most relevant journals in urban renewal and sustainable development since 2000 were analyzed. The most frequently cited articles were analyzed using analysis of social networks (VOSviewer). The results revealed potential future focuses of research and guidelines that link urban renewal and sustainability: the engagement of all stakeholders in the decision-making process; the involvement of residents in projects; the development of cooperation between towns and cities; the preservation and reuse of built and industrial heritage while respecting environmental law; and, finally, the search for new financing techniques. These potential future research topics were analyzed in four research areas so that sustainable development can easily be integrated into an urban renewal project.

Environmental and urban sciences have shown that brownfield problems have a significant impact on human behavior and its environment. Understanding the sustainable planning and redevelopment of brownfields can therefore help governments and financial partners to consider sustainable urban policies as a key priority. This study presents a bibliometric analysis of research publications on the sustainable redevelopment of brownfields through the Scopus database since 1990. The redevelopment of brownfields having an essential role in urban sustainability, so research trends on sustainable redevelopment brownfields in previous literature are revealed. To our knowledge, the bibliometric analysis of the term sustainable redevelopment of brownfields is not yet an accentuated field of research. To do this, this study aims to fill this gap by offering a broad overview of the bibliometric analysis of the literature relating to this term. Brownfield and contaminated land are used as a keyword in the article titles taken from the Scopus database on September 07, 2021. A total of 7197 scientific articles (Scopus) were reviewed to show how the research on " brownfields or contaminated land” has emerged and developed. Social media analysis (VOSviewer) was used for data visualization and Harzing's Publish or Perish is used for metrics and citation analysis. The results showed an increase in the growth rate of the literature on sustainable brownfield redevelopment since 1990, particularly from 2011 to 2020. Research related to the sustainable redevelopment of brownfields has involved various authors and is published in various languages. There are 160 authors from 126 countries and 160 institutions. The China is the largest contributor to this study, followed by the United States and United Kingdom. The Chemosphere Journal has published the most articles on the sustainable redevelopment of brownfields. Although our results also indicate that studies on the sustainable redevelopment of brownfields are mainly carried out in the field of environmental sciences. Some avenues for future research have been analyzed in three directions so that sustainable development can easily be integrated into a brownfield redevelopment project.

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For current territory development planning in China, city center accessibility (CCA) has gained increasing attention for evaluating the expansion of urban areas. How should CCA and its differences between the automobile and public transit (PT) modes be measured? We analyzed CCA from travel time and travel cost perspectives using the travel data obtained from the Baidu Map at a 100 m × 100 m resolution. The GWR was then examined to explore the correlation between the explanatory variables and the CCA differences. Automobile-based CCA shows a concentric structure and varies with time, while PT-based CCA has an apparent linear expansion along the metro lines and fluctuates less. When measuring by travel cost instead of travel time, CCA gaps between the two modes are lessened, and the automobile’s advantage is no longer evident. The distance from the metro stations has a significant positive effect on CCA differences, and the positive effect concentrates in the 3.6 km range (measured by travel time) and 2.8 km range (measured by travel cost) range around the metro stations. Our study highlights the importance of multiple perspectives when comparing the accessibility of different transport modes, and the results also provide implications for policy-makers.