Each town or district possesses a variety of facilities and amenities allocated strategically to serve as much as possible on at least a basic scale, and on the regional scale, an intermediate one. Any function of the Central Area not served then is allowed by the regional centre to be executed efficiently as the transport routes are planned to link up the regional centres and Central Area effectively. The Housing Development Board works with the Urban Redevelopment Board to develop public housing according to the national urban planning policy.