Nagayamma Aragão

Biographical note

Geographer, started his professional career in the associative area 15 years ago, developing planning projects and spatial planning of African societies.

Master in Geography and Development, specialised in Civil Protection and Spatial Planning, concluded the technological training in Geographic Information Systems, doctoral student in Urbanism by the Lusophone University of Humanities and Technologies (Portugal).  

The enthusiasm for research comes from the need to equate mobility and transport problems as issues of contemporary cities, giving special relevance to informal transport, urban development and mobility in the African context, a theme that has been developed since its master’s dissertation, giving special attention to the importance that these territories play as a driving force of the economy and capacity, to generate spatial dynamics, cooperating in the development of societies where it operates, as well as in formulating more assertive policies, focused on people and sociability-oriented planning.  

Capacitated to act in the area of Multifinalitarian Territorial Register in order to develop a work of usefulness and scientific rigour in the area of rural, urban and regional territorial planning, with emphasis on urban services.

Currently working in projects and articulation of integrated solutions in solving community problems and institutions, in a multicultural environment, in Portugal and abroad.

Areas of academic and scientific interest

  • Geography
  • Planning and Spatial
  • Planning Mobility
  • Transport Geographical Information Systems and Urban Planning

Individual doctoral project

“Development of an Informal Collective Transport Management Model for São Tomé (S.T)”
Professor Diogo Mateus
Professor Juan Pedro Moreno Delgado


The goal is to create a management model that results from an analysis of the current informal transport system (taxi), based on integrated and strategic policies at various scales, while promoting the spatial organization of urban activities through a balanced transportation system, linking activities / functions of efficient and sustainable way.

The assignement has as its methodological proposal the creation of regulations through the combination of synchronic analysis (data stakeholders of the sector) and diachronic (comparisons with reference characteristics), through the auscultation, discussion and elaboration with the purpose of a model that serves as support for the management of S.T.


The lack of the mobility plan provides the informal and deregulated sector to meet various interests, questioning social equity issues through tariff and geographic discrimination, making users hostage in the organic system Private initiative in S.T. The “failure of the state”, deregulation or even absence of the sector’s legal order, unlike most African cities where informal, albeit deregulated transport, appear as a complementary means to the transport system, here It is confused with the process of structuring the city, acting in the dynamics and development, creating new axes of growth should be treated as public policy, providing change and develop spatial, analytical and with the creation of the instrument in the promotion of solutions.  

The investigation figures the need to define an informal transport management model (taxi) in S.T. sustained in the analysis of mobility patterns faced with the public inertia of the various actors of society is objective to bring the approach to the public arena, Through the cultural and political character that will serve as a matrix for the interpretation of the problem having as a question of departure “What are the criteria for the regulation of the informal transport sector?”

Given the complexity and relationship between the transport system, levels of economic development and organization of the Territory, the study aims to:

  1. Knowing the importance of taxi in the territory and its articulation with the policies of land use and patterns of daily displacement
  2. Develop and present methodologies and techniques of network analysis of the transport system, for the realization of the model (Objective 3), focusing on good practices, with relevance to the promotion and regulation of informal collective transport, in the various Spheres of action, namely the development model of the Territory, behavioral factors and administrative organisation of the transport sector;
  3. Development of a mobility and transport management plan enabling the regulation of informal collective transport by Mobility and terrestrial transport Institute.

The deregulation of the transport sector in the informal segment, triggers obstacles in the strategic management, in which the evaluation does not go exclusively from the confirmation of compliance to various scales of action. It is imperative to delineate adequate levels of mobility and accessibility offered to the citizen, sustained in the promotion of social equity; reduction of local asymmetries; establish efficient settings; improve the quality of life of communities in the social spheres, environment, economy; Development of urban solutions with a bet on the diversity and complementarity of urban functions, i.e. the adequacy of integration and land use policy.  

The proposal for normative/regulatory intervention will consider rationalities (environmental, social, cohesion and security), benefiting the final readings and results of a higher degree of adherence to reality and more positive impacts in the value chain A assessment of impacts, will contribute to the proposal and presentation of realistic solutions, which, present a vision of a dynamic sector with differentiated stages of development and maturity, in the various sub-sectors, allowing the user access to a quality transport system.  

In São Tomé, in view of the absence of strategic guidelines, the inexistence of the state and the lack of legal order in the sector translates into the need to discuss the role of this service in society, as a single mode of regular collective transport although deregated.