Measuring the Evolution of Urban Resilience Based on the Exposure–Connectedness–Potential (ECP) Approach: A Case Study of Shenyang City, China

Resilience is a new path to express and enhance urban sustainability. Cities suffer from natural shocks and human-made disturbances due to rapid urbanization and global climate change. The construction of an urban resilient developmental environment is restricted by these factors. Strengthening the comprehensive evaluation of resilience is conducive to identifying high-risk areas in cities, guiding regional risk prevention, and providing a scientific basis for differentiated strategies for urban resilience governance. For this study, taking Shenyang city as a case study, the resilience index system was constructed as an ECP (“exposure”, “connectedness”, and “potential”) framework, and the adaptive cycle model was introduced into the resilience assessment framework. This model not only comprehensively considers the relationship between exposure and potential but also helps to focus on the temporal and spatial dynamics of urban resilience. The results show that the exposed indicators have experienced three spatial evolution stages, including single-center circle expansion, multicenter clustering, and multicenter expansion. The potential index increased radially from the downtown area to the outer suburbs, and the low-value area presented a multicenter pattern. The spatial agglomeration of connectivity indicators gradually weakened. The results reflect the fact that the resilience level of the downtown area has been improved and the resilience of the outer expansion area has declined due to urban construction. The multicenter cluster pattern is conducive to the balance of resilience levels. In terms of the adaptive cycle phases of urban resilience, the first ring has gone through three phases: exploitation (r), conservation (K), and release (Ω). The second and third rings have gradually shifted from the exploitation (r) phase to the conservation (K) phase. The fourth ring has entered the exploitation (r) phase from the reorganization (ɑ) phase. The fifth ring and its surrounding areas are in the reorganization (ɑ) phase. The results provide specific spatial guidance for implementing resilient urban planning and realizing sustainable urban development.

Analysis of Bicycle-Motor Vehicle Crashes in San Antonio, Texas

Bicycling is inexpensive, environmentally friendly, and healthful; however, bicyclist safety is a rising concern. This study investigates bicycle crash-related key variables that might substantially differ in terms of the party at fault and bicycle facility presence. Employing 5 year (2014–2018) data from the Texas Crash Record and Information System database, the effect of these variables on bicyclist injury severity was assessed for San Antonio, Texas, using bivariate analysis and binary logistic regression. Severe injury risk based on the party at fault and bicycle facility presence varied significantly for different crash-related variables. The strongest predictors of severe bicycle injury include bicyclist age and ethnicity, lighting condition, road class, time of occurrence, and period of week. Driver inattention and disregard of stop sign/light were the primary contributing factors to bicycle-vehicle crashes. Crash density heatmap and hotspot analyses were used to identify high-risk locations. The downtown area experienced the highest crash density, while severity hotspots were located at intersections outside of the downtown area. This study recommends the introduction of more dedicated/protected bicycle lanes, separation of bicycle lanes from the roadway, mandatory helmet use ordinance, reduction in speed limit, prioritization of resources at high-risk locations, and implementation of bike-activated signal detection at signalized intersections.

Analysis and optimization of 15-minute community life circle based on supply and demand matching: A case study of Shanghai

The 15-minute community life circle (15min-CLC) strategy is one of Shanghai’s important methods for building a global city and facing a society with a more diverse population structure in the future. In the existing research, the balance between the construction of the life circle and the needs of the people in the life circle still needs to be further fulfilled. This paper is based on the city’s multi-source large data set including 2018 AutoNavi POI (Point of Interests), OSM (OpenStreetMap) road network data and LandScan population data set, and evaluates the current status of Shanghai’s 15min-CLC through the fusion of kernel density estimation, service area analysis and other statistical models and proposes relevant optimization suggestions. The results show that there are the following shortcomings: (1) From the perspective of different types of infrastructure service facilities, the spatial construction of Shanghai’s overall life service facilities and shopping service facilities needs to be optimized. (2) From the perspective of comprehensive evaluation, the comprehensive service convenience of infrastructure service facilities in the downtown area is relatively high, while the comprehensive service convenience of urban infrastructure service facilities in the suburbs and outer suburbs is relatively low; The diversity of basic service facilities in the 15min-CLC in the downtown area is more consistent with the population distribution; However, in the peripheral areas of the urban area, too many infrastructure service facilities have been constructed. Based on the above shortcomings and the perspective of supply and demand matching, relevant optimization strategies are proposed in different regions and different types of infrastructure service facilities: (1) focus on the construction of basic service facilities in the urban fringe and urban-rural areas, improve the full coverage of the basic service facilities, and appropriately reduce the number of basic service facilities in the downtown area. (2) The development of community business models can be used to promote the development of new life service facilities and shopping service facilities. (3) Improve community medical institutions through facility function conversion, merger and reconstruction, etc. (4) Optimize the hierarchical basic service facility system and improve the population supporting facilities of basic service facilities in the 15min-CLC. This paper incorporates people’s needs and concerns on the living environment into the 15min-CLC evaluation model, and uses Shanghai as an example to conduct research, summarizes the existing shortcomings, and proposes corresponding optimization strategies based on the matching of supply and demand. This article attempts to explore a replicable 15min-CLC planning model, so that it can be extended to the Yangtze River Delta urban agglomeration, to provide reference for further research on the 15min-CLC, and to promote urban construction under the concept of sustainable development.

Assessing the Spatial Distribution Pattern of Street Greenery and Its Relationship with Socioeconomic Status and the Built Environment in Shanghai, China

Urban greenery is widely acknowledged as a key element for creating livable urban environments and improving residents’ quality of life. However, only a few current studies on the subject of urban greenery focus on a human visual perspective and take street greenery into consideration. Street greenery is an indispensable component of urban vegetation to which residents have a higher frequency of access. Additionally, few studies focused on the disparity of the green view at a micro-level, such as at a county or community level. This study explored the spatial distribution of street greenery and its influential factors using the green view index (GVI) as the main evaluation indicator. Compared to other traditional indicators of greenery, such as the normalized difference vegetation index (NDVI) and accessibility, GVI is recognized as a human-oriented indicator to evaluate the quantity of greenery viewed by human eyes in daily life. The downtown area of Shanghai was chosen as the case study, as it reflects the common phenomenon of street greenery in many megacities globally. In addition, county/jiedao (the same administrative area as county in China) level was selected as the minimum geographical unit to evaluate the disparity of GVI and its influential factors to fill the knowledge gap. We analyzed 233,000 pieces of street-view images from Baidu Map and other correlated data. The results showed (1) the street greenery of 70% of the downtown area of Shanghai is less than the recommended comforFogre visual environment; (2) street greenery is spatially clustered in Huangpu district, Xuhui district, college town, and the Century Park of Shanghai; (3) street-greenery distribution is positively correlated with housing price and street network density, and negatively correlated with the ratio of society vulnerability; however, it is uncorrelated to population density. According to these findings, local municipalities could improve urban planning and design by introducing a more human-oriented green-space policy that improves social equity.

Hybrid methodology of multi-sensory research of public space in urban planning

The concept of multi-sensory perception of cities is one of the elements shaping the complete image of the city. It is an aspect as important to the recipient as the urban structure. The study of the multisensory record of public spaces gives a better chance to understand: the identity of the place, the changing dimensions of cultural heritage, local social problems, and even conditions influencing spatial decisions. Multisensory research has an implementation value and can be an important, previously unaccounted for factor, influencing the revitalization program and planning decisions. Therefore, it is so important to analyze the available literature on the subject, conduct scientific observation of the research area, create a proposal for a hybrid research methodology on multi-sensory recording of space and determine their relationship with activities in the field of urban planning. The trial area – selected public spaces of the Praga – Północ district in Warsaw was adopted according to predetermined criteria, the most important of which were: authentic urban tissue, downtown area, architectural and functional diversity of buildings.

ARCHITECTURAL-URBAN-MODELING OF THE NETWORK OF PUBLIC SPACES IN THE CENTRAL PART OF THE LARGEST CITY (ON THE EXAMPLE OF KHARKIV)

The paper is dedicated to the problem of creating a network of public spaces in the downtown area of a major city as an effective means of its humanization. The goal of the work is to justify and develop a graphical model of the network of public spaces in the structure of the downtown area of a major city on example of Kharkiv. Analysis of the scientific works of foreign and domestic authors has shown that the issues relating to the formation of a spatially integrated network of public spaces have not been subjected to special scientific scrutiny. The use of the law of isomorphism of structures of urban planning systems suggested that a network of public spaces could have a linear-nodal spatial organization. It is shown that open public spaces are located along the streets and should be seen as part of the city’s communication framework. The placement of a significant variety of small public service elements on the first floors of the city center neighborhood development contributes to the formation of public spaces along the streets. These pedestrian spaces providing connections to subway stations are “linear” components of the network. The presence of open, undeveloped spaces in areas close to the entrances to subway stations creates attractive conditions for the formation of new types of public spaces. On the basis of analysis of placement of 8 subway stations in the structure of the downtown area of Kharkiv there was justified the assumption that it is their areas that are considered to be “nodal” elements of the networks of public spaces. In this way, a spatially integrated network of public spaces is created and presents an effective means of humanizing the urban environment as a whole. The study of the architectural and urban construction of the network of public spaces in the city structure led to the conclusion of the effectiveness of such a measure in social, economic and aesthetic aspects.

Analysis of Pedestrian–Motor Vehicle Crashes in San Antonio, Texas

Pedestrian safety is becoming a global concern and an understanding of the contributing factors to severe pedestrian crashes is crucial. This study analyzed crash data for San Antonio, TX, over a six-year period to understand the effects of pedestrian–vehicle crash-related variables on pedestrian injury severity based on the party at fault and to identify high-risk locations. Bivariate analysis and logistic regression were used to identify the most significant predictors of severe pedestrian crashes. High-risk locations were identified through heat maps and hotspot analysis. A failure to yield the right of way and driver inattention were the primary contributing factors to pedestrian–vehicle crashes. Fatal and incapacitating injury risk increased substantially when the pedestrian was at fault. The strongest predictors of severe pedestrian injury include the lighting condition, the road class, the speed limit, traffic control, collision type, the age of the pedestrian, and the gender of the pedestrian. The downtown area had the highest crash density, but crash severity hotspots were identified outside of the downtown area. Resource allocation to high-risk locations, a reduction in the speed limit, an upgrade of the lighting facilities in high pedestrian activity areas, educational campaigns for targeted audiences, the implementation of more crosswalks, pedestrian refuge islands, raised medians, and the use of leading pedestrian interval and hybrid beacons are recommended.

Transgressive actions and the production of public space : policy, people and urban space in Winnipeg's downtown

Public space is planned space. The discourse that takes place among federal, municipal and local governments, as well as the interaction that takes place on the street between people, informs the agenda and values inherent in policy and social norms. Urban revitalization strategies and city bylaws produce public and private spaces, thereby informing the cityscape within which everyone interacts. This study examines the contribution, circulation and regulation of transgressive actions in Winnipeg, Manitoba, Canada, in order to consider what these actions reveal about power relations in the urban environment and the production of public space. This research uses both a policy case study and urban theory to investigate the means by which public and private spaces are produced and imbued with the ideologies that shape and maintain these spaces in Winnipeg's downtown area.

Transgressive actions and the production of public space : policy, people and urban space in Winnipeg's downtown

Public space is planned space. The discourse that takes place among federal, municipal and local governments, as well as the interaction that takes place on the street between people, informs the agenda and values inherent in policy and social norms. Urban revitalization strategies and city bylaws produce public and private spaces, thereby informing the cityscape within which everyone interacts. This study examines the contribution, circulation and regulation of transgressive actions in Winnipeg, Manitoba, Canada, in order to consider what these actions reveal about power relations in the urban environment and the production of public space. This research uses both a policy case study and urban theory to investigate the means by which public and private spaces are produced and imbued with the ideologies that shape and maintain these spaces in Winnipeg's downtown area.