

For the EU, such restrictions are specified in the Route Availability Document (RAD) (see Further Reading section below). restricting flights based on their departure or destination). Rerouting of certain traffic flows (e.g.sending controllers from another facility to cope with seasonal or temporary traffic peaks) These are carried out after consultations with the ATC service providers and aircraft operators. Strategic planning. This phase includes measures that are normally carried out well in advance, e.g.These measures are restrictive in nature and therefore should be kept to the minimum and, whenever possible, be applied selectively (but not be discriminatory) so as to affect only that part of the traffic which causes the problem and they should be applied only for the period when expected air traffic demand will exceed the capacity in those areas. Measures to control the flow of air traffic need to be taken in certain cases to ensure a reasonable balance between the traffic demand and the ability to accommodate that demand. insufficient advance notice of likely traffic demands which may cause overloads at certain points or during specific times.lack/insufficient surveillance equipment or obsolete data processing systems) that cannot cope with the growth of air traffic. inadequate procedures for the transfer of control) or inadequate equipment (e.g. Often the reason for this is insufficient staffing but may also be inefficient procedures (e.g.


Source: ICAO Doc 4444 PANS-ATM Description A service established with the objective of contributing to a safe, orderly and expeditious flow of air traffic by ensuring that ATC capacity is utilized to the maximum extent possible, and that the traffic volume is compatible with the capacities declared by the appropriate ATS authority.
