Planification urbaine et usages des quartiers précaires en Afrique

Since 2000, declarations issued in rapid succession by the international community have aimed at setting goals to drastically improve the living conditions of slum dwellers while, in the same time, the slums dwellers increased by 4,5% per year in Africa. Simultaneously, we have witnessed changes in the manner in which city residents perceive space: in today's city, the relationship between places and flows constitutes the new living space and sense of belonging (Castells, 1996). With the changes in the information society, space of flows are transformed into power flows, concentrated in space of flows which dominates more and more space of places, peripheriques areas where flows takes place everyday. Using this theory as grid, it is to re-examine the evolution of urbanization in African cities and their shantytowns. Indeed, this process of domination of the space of flows has implications for the planning approaches and uses of space of place in slums. This dual vision, putting power to the flows of space valued by the elites'cities of the living spaces of places experienced by people, is used to observe, name and understand the past and the future of cities. These elements have resulted in the formulation of a number of questions that have served as guidelines for this research. This research first targets the development of the urbanization process and the role of precarious neighborhoods: what measures are now being implemented by the authorities to reconcile the need to improve the competitiveness of African cities (advocated by donors) with the expectations of people in poor neighborhoods? In a second phase, the role of these neighborhoods' community areas is evaluated: are they a media to be valued and included in the projects to restructure the neighborhoods? Two assumptions have emerged from said questions. The first concerns the process of urbanization in African cities. This involves an analysis of the balance of power between the application of modernizing planning practices and the use of space by the residents of the neighborhoods. The second questions the role of community spaces as efficient public areas within the framework of projects to upgrade the neighborhood. The expected results of this thesis aim i) to understand the evolution of these precarious areas in the building of African cities, ii) to learn about the place and the role of community spaces and to learn from neighborhood upgrading projects. For this study, two cities were chosen: Douala (Cameroon's economic capital) and Kigali (Rwanda's political capital). For each, two methodological perspectives were adopted: the first is a comprehensive study of the entire city, based on plans, planning documents, interviews with local officials, archive documents; and the second is as a local study carried out in a market area of the city, based on observations, interviews, a questionnaire developed from a representative sample of traders, and a social and spatial analysis of the neighborhood. This approach is therefore comparative (two cities and two districts), multi-scale (two scales of analysis), historical (identifying cultural, social and political customs) and interdisciplinary (even holistic to a certain extent, taking into account different disciplines such as law, economics and urban sociology). Ultimately, this study reveals both the local specificities and differences of each city. These dissimilarities were largely developed in the presentation of these territories. They are indeed important, especially for the city of Kigali, which is undergoing a process of post-genocidal reconstruction. However, it also appears that each city's path contains a significant number of common characteristics, mainly linked to the responses they provide to urban problems: globalization today tends to standardize practices. The first element common to both areas is urban duality. This process occurs first in an urban form. The African city today remains a binary geographical entity: the city that separated the indigenous people from the settlers was succeeded by a post-colonial city marking the separation between the inherited formal city and the informal city in creation. This urban confrontation can be seen as a form of inertia, defined as a rectilinear uniform advance, suitable for the fabric of the city. The analysis of the evolution of city planning shows that projects have failed to break this logic. The delay accumulated in this field since the 80s had the effect of amplifying the phenomenon. Furthermore, this duality is reflected in the urban power struggle between the authorities and the inhabitants. On the one hand, the authorities seem determined to reproduce and keep constant both tension with and distance to the population, seeking to maintain their social control over the population. On the other hand, residents of poor neighborhoods regularly claim a "right to the city". This inertia does not mean a lack of change. This manifests itself through urban crises which temporarily break the balance. A new order is then implemented, replicating the urbanization process that prevailed in the old order. In a second phase, this research highlights the struggle for territory which emerges in these African cities. Indeed, in the midst of the general trend of inertia and reproduction, a few evolutions are worth mentioning. There is first of all a real spatial and social fragmentation of urban areas. This process occurs both in the slums and the formal rich neighborhoods mushrooming more and more on the outskirts of the city (near the urban ring roads serving these new places in which to live). To this diversification of territorial situations can be added an increasing number of slum upgrading projects, the results of which fail to meet the original targets. Moreover, even within neighborhoods, there is a fragmentation of community spaces, such as markets. The latter have undergone an important evolution since the 80s, sometimes leading to conflict between this type of local trade and the business carried out in shopping malls, which is claimed to be modern. The influence of the space of flows and the implementation planning process promote liberal "modern" sector, consisting of subsidiaries of large corporations, supermarket chains to a upper class people, while causing profound changes in space with neighborhood markets. The challenge of planning for the city of tomorrow appears to reduce this duality and to take into account this duality to prevent the development of precarious neighborhoods and urban fragmentation.

Incremental Urbanism: A study of incremental housing production and the challenge of its inclusion in contemporary planning processes in Mumbai, India

Tobias Stefan Baitsch

Whilst urbanisation reached an unprecedented dimension, in a not so distant future half of the urban population will live in

informal¿ settlements. Often subsumed under the pejorative term slum, these habitats account for the majority of the future urban growth. Incremental urban development was once accepted as a viable means of addressing housing needs for large parts of the urban population. However, these approaches were largely abandoned in the 1990s in favour of mass housing provided through public private partnerships. While these largely failed in providing the required quantities and produced poor urban spaces, the scale of the phenomenon is such that incremental urban development needs reconsidering. However, in contrast to the well-documented experiences of the 1970s and 1980s, there is a lack of knowledge about the actual functioning of incremental development in contemporary regimes of urbanisation. Adopting an approach informed by French pragmatist sociology (Boltanski and Thévenot 2006), particularly the sociology of convention (Thévenot 1984), this research inquires into the production of slums at two levels: the intricate reality of housing production in Mumbai¿s slums and the contemporary controversies revolving around urban development. Building on fieldwork in a

self-built¿ resettlement colony in Mumbai forty years after it was established, this research examines how incrementally developing settlements are made, maintained, and transformed through everyday practices of local actors. Standing at the crossroads of the market, the political, and the social the so-called contractors are key figures engaged in the processes of construction and house making. As mediators in and of incremental urbanism they produce not only built-up space but also social space. Focusing on contractors as hitherto under-examined figures reveals that self-help housing in Mumbai, in contrast to conventional believes about housing practices of the urban poor, is by and large a professionalised mode of urban production. This research offers a refined account of the intricate reality of housing production and the ambiguous nature of incremental urbanism. Regarding urban planning, this research analyses the on-going revision of the Mumbai Development Plan 2014-2034 and the controversies accompanying it, which brings to the forefront the interplay of powers and arguments that otherwise are disguised in the dispersed and detached everyday making of the city. To better understand the discourse on current planning practices and struggles over conflicting approaches towards slums, this research examines the arguments and legitimization principles that underpin four major positions advocated in the controversies as the `good¿ way to urbanisation. Considering them as equally valid positions allows drawing comparisons between the different conceptualisations of urban planning and development, and the role and legitimacy they confer to modes of incremental urbanism. Reading the two moments in the production of Mumbai¿s slums together sheds light on the challenges to incorporate incremental urbanism into planning processes. It is argued that these challenges lie not solely with the conflicting rationalities ¿ or cosmos ¿ of how to create a just city, which clash in the controversies, but also with the ambiguity of incremental urbanism itself. Both of which contribute to complex processes of invisibilisation, or subalternisation, of incremental urbanism.

EPFL2018

Sustainable Development, Planning and Poverty Alleviation

Jean-Claude Bolay, Eléonore Labattut

In 2018, the world population is around 7.6 billion, 4.2 billion in urban settlements and 3.4 billion in rural areas. Of this total, according to UN-Habitat, 3.2 billion of urban inhabitants live in southern countries. Of them, one billion, or nearly a third, live in slums. Urban poverty is therefore an endemic problem that has not been solved despite all initiatives taken to date by public and private sectors. This global transformation of our contemporary societies is particularly challenging in Asia and Africa, knowing that on these two continents, less than half of the population currently lives in urban areas. In addition, over the next decades, 90% of the urbanization process will take place in these major regions of the world. Urban planning is not an end in itself. It is a way, human and technological, to foresee the future and to act in a consistent and responsible way in order to guarantee the well-being of the populations residing in cities or in their peripheries. Many writers and urban actors in the South have criticized the inadequacy of urban planning to the problems faced by the cities confronting spatial and demographic growth. For many of them the reproduction of Western models of planning is ineffective when the urban context responds to very different logics. It is therefore a question of reinventing urban planning on different bases. And in order to address the real problems that urban inhabitants and authorities are facing, and offering infrastructures and access to services for all, this with the prospect of reducing poverty, to develop a more inclusive city, with a more efficient organization, in order to make it sustainable, both environmental than social and economic. The field work carried out during recent years in small and medium-sized cities in Burkina Faso, Brazil, Argentina and Vietnam allows us to focus the attention of specialists and decision makers on intermediate cities that have been little studied but which are home to half of the world's urban population. From local diagnoses, we come to a first conclusion. Many small and medium-sized cities in the South can be considered as poor cities, from four criteria. They have a relatively large percentage of the population is considered to be poor; the local government and its administration do not have enough money to invest in solving the problems they face; these same authorities lack the human resources to initiate and manage an efficient planning process; urban governance remains little open to democratic participation and poorly integrates social demand into its development plans. Based on this analysis, we consider it is imperative to renovate urban planning as part of a more participatory process that meets the expectations of citizens with more realistic criteria. This process incorporates different stages: an analysis grounded on the identification of urban investment needed to improve the city; the consideration of the social demands; a realistic assessment of the financial resources to be mobilized (municipal budget, taxes, public and international external grants, public private partnership); a continuous dialogue between urban actors to determine the urban priorities to be addressed in the coming years. This protocol serves as a basis for comparative studies between cities in the South and a training program initiated in Argentina for urban actors in small and medium-sized cities, which we wish to extend later to other countries of the South.

2019

Comprendre la construction des périphéries urbaines à Lomé et Yaoundé

Armel Firmin Kemajou Mbianda

Urbanization in Sub-Saharan Africa is mainly marked by an extremely high speed. For a couple of decades, it has become more and more difficult to study and control the urbanization processes using the available means due to their rapidity. These conditions do not allow to master social, cultural and economic potentials of urbanization at their best so as to develop the countries in the sub-Saharan region of Africa. The binding speed of urban sprawl that we are witnessing further leads to an accelerated consumption of natural spaces, and more generally, to a degradation of natural ecosystems; while the urgency to tackle the environmental crisis requires the establishment of more sustainable models of cities. Indeed, in addition to the rapid consumption of natural spaces, cities are responsible the most for the global production of greenhouse gases and other negative externalities for the environment. This is why our response to climate change necessarily involves smart choices in urban planning. In my doctoral research the urban peripheries are what constitute the most relevant research objects â the crucial ingredients to debate on the African city of the future. Surprisingly, very little attention has ever been drawn on them. I hold that no urban planning would be effective without a careful study of the shared reality of social, economic, political and cultural dynamics of the cities concerned. This hypothesis further leads me to offer a solid understanding of construction mechanisms in the peripheral areas of such two large cities as LomÃ© and YaoundÃ© in thinking about the models of the future. A two-tier triangulation is used to achieve the study goal. Three different thematic entries namely urban land, mobility and the legal framework for town planning get used at the theoretical level. At the methodological one, a variety of tools are made available for data collection and analysis to deal with the difficult processes of accessing urban data. GPS tracking of motorcycle taxis operating in emerging neighborhoods, participatory mapping for land use and prices at the agglomeration level, Geo-Computation, Geo-visualization, content analysis and more traditional interviews are the main methods used in my research. The thesis shows that the construction of a larger portion of new neighborhoods in the cities of LomÃ© and YaoundÃ© result in a weaving of a sort of âindividual urbanistic projectsâ, which are totally outside the rule of law. The speed and spatiality of this process are also strongly increased by motorcycle taxisâmeans of transport unprecedented in their scaleâwhich come massively along with the new residentsâ home ownership projects. Again, the thesis highlights that the configuration of the land market escapes the administrative limits of cities, thus rendering the lawful measures non-operational in the planning and monitoring of space. All in all, the research results reveal individual strategies to be extremely varied and complex even if all residents of urban peripheries seem like to âbet onâ their urban status to regain it later. This latest finding dispels the myth that the lower middle class moves as far from the city center as possible in search of affordable land. On the basis of major results, the thesis formulates practical recommendations aimed at improving urban planning policies in sub-Saharan Africa, in the sense of making them more in line with the reality of the cityâs production processes.

EPFL2020