By means of cyclomatic number C, index α, index β, and index γ inherent in graph theory, this paper shows the bad connectivity of Mbujimayi town (that is 18% of connexion). To ameliorate it, we propose, on the one hand, the reorganization of actual highway network providing a long bypass to which others axis will connected, and on the other hand, to rehabilitate some main roads, to bridge small and big ravines, to plant bamboos or vetivers on the embankments of ravines preventing the gully erosion. From this system rehabilitated, the connectivity indices calculated show that the highway network is completely ameliorated (that is 55% of connexion).
This study has allowed to point out first a threefold quarter rings of the city of Mbujimayi namely, geographically accessible quarters, less accessible quarters and hardly accessible quarters. And then, it has pointed out two types potential quarters, notably attacting quarters and emittingquarters. Finally to further the analysis, a sectorial, holistic anddurable arrangement based on UNESCO’s norms, revealing a double threefold typology of the main groups of these quarters has been proposed. The data were collected from the urban Department of Primary, Secondary, and Professional education. And, accessibility algorithms designed by Rodrigue (2006) have contributed to the calculation of different accessibility indices.
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