Definition – A group of urban municipalities or administrative units which are closely linked with respect to the provision of urban services and mobility.
Relevance to SUMP – A SUMP should be prepared for the entire ‘functioning area’ of a city (as defined by major commuter flows) and is therefore likely to cover both the main urban area and surrounding towns and villages within the commuter ‘belt’/region. In most cases the ‘functioning area’ of the city will extend beyond the administrative boundary of the central municipality, so collaborative working with neighbouring public authorities is necessary. See also urban agglomeration and territorial integration.
Source: EEA, 2013