随着我国城市化的加速发展和城市的迅速扩展,都市区化已成为我国沿海地区特大城市发展的新主题,特大城市空间结构向多中心演变,由此在原主城区的外围形成了一些承载中心城区功能外溢的次区域。然而,我国既有的法定规划体系中没有次区域规划层面的规定,导致法定规划层面的巨大落差和规划衔接的困难。鉴于此,有必要在特大城市中增加次区域规划这一中观层次规划,充分发挥次区域规划承上启下的作用:在中心城区,由相当于次区域规划层级的中心城区规划指导下一层次的分区规划;在城市近郊,由次区域规划指导分区规划或卫星城、卫星镇(新城、新市镇)等的城市总体规划。
Metropolitanization is a new trend of Chinese mega cities as urbanization moves on.As mega cities evolve toward a multi-nucleus spatial structure,sub-districts are in formation on urban fringes.Sub-district level planning is yet absent in China's legal planning system.It is necessary to add this intermediate level planning in mega city planning structure as a transitional stage of upper and lower plans.In central city,central district planning,which equates sub-district level planning,pilots lower level planning;in near suburb,sub-district planning pilots district and satellite city planning.