Bangkok Metropolitan General Plan enforced in 1922 is considered to be the first modern urban comprehensive planning effort with a long establishing process since the enactment of Town and Country Planning Act in 1975 in Thailand. During this period, the transformation in the policy formulation mechanism from bureaucratic policy to more democratic one partially driven by the emerging middle class had determined the trajectory of this process. In this paper by dividing this process into three phases according to the characteristics of each policy-making mechanism the efforts both of establishing effective land use planning system and of institutionalizing the coordination mechanism of various infrastructure developments in each phase are analyzed.
