Bangkok growth expectations are beyond the 100% threshold for the next 50 years. This is due to the urbanization rate for Thailand and the increase of urbanized land-use per inhabitant as an effect of economic development. Ten million people will move to Bangkok adding up to the existing 14 million, and these people will require more urban land than the actually urbanized.
Should Bangkok expand the pattern of conurbation? That is ineffective and unsustainable. The alternative is the well contrasted polycentric approach. The actual short-sighted metropolitan policies have to be revised in benefit of equitable planning and resilience to climate change and sea level rise.