Urban mobility in developing cities : difficulties of measures, uncertainty of trends and of sustainability appraisal.

Little is known about mobility and its evolution in developing cities. There are multiple obstacles limiting the quality of information. In this paper, three cases of cities (Dakar, Tunis, São Paulo) are examined. Comprehensive surveys were implemented, with results which call for analysis and debate for their interpretation. These tasks of analysis and consistency checking between multiple data are very necessary for any approach of sustainability integrating environment concern.