Accessibility is a comprehensive performance measure for the integration between land use and transport systems. In this research, two accessibility measures were applied to evaluate the integration between transport and land use in Hanoi metropolitan area: Vietnam, which has a typical monocentric urban form in the current situation, and Randstad metropolitan area, the Netherlands, which has a typical polycentric urban form. Job accessibility by private and public transport was calculated using the traditional potential accessibility measure corrected for competition of jobs. The results show there is a potential improvement of levels of accessibility in Hanoi through its planned transition into a polycentric urban form. The results illustrate the complex relationship between urban and regional planning and transport, and how spatial knowledge and geographic information system (GIS) tools can be used to provide urban planners, transport planners and engineers in Hanoi with valuable information related to its present plans of decentralization, and bring them together.