 A series of four rings were outlined (Inner Urban, Suburban, Green Belt and Outer Country) in order to control development and limit sprawl into regional areas.The 'Inner Urban Ring' restricted any new housing or industrial development that were deemed to be above the limit of tolerable conditions, whilst reconstructing damaged buildings in a modern interpretation of their original state.The 'Suburban Ring' would be developed with a mix of both housing and light industry so that no regions became inefficient dormitory suburbs.