Definition – In the context of SUMP development and implementation, a neighbouring authority
refers to another borough, city, district or county authority located within the functioning area of the central city that is leading SUMP preparation.
Relevance to SUMP – An important aspect of the SUMP concept is that the geographical area of the plan should reflect the pattern of journeys routinely made by people, as opposed to administrative boundaries. The SUMP should therefore be developed for the functioning city, involving neighbouring authorities through the process of horizontal/territorial integration.