This article is an attempt to build an understanding of curren t interactions between land development and transportation infrastructure in the Jakarta Metropolitan Area. The in tention is to pro vide a basis for further research in transportation and land use planning in megacities in the developing world. Four issues are revealed by the discussion. First, transp orta tion infrastructure development has promoted urban sprawl in Jakarta 's peripheries. Second, the increased accessibility of suburbs, combined with poor land management and corrupt public servants have resulted in uncontrolled development in Jakarta's urban fringes. Third, the curren t situation o f Jakarta's organic growth has resulted from the informal development practices which dominate the land development in Jakarta's suburbs. Fourth, the government should be more consistent in following their own plans and regulations. Otherwise, the uncon trolled development which has reached an alarming position will be far more difficult to handle.