air traffic service route
A specified route designed for channelling the flow of traffic as necessary for the provision of air traffic services.
ICAO, Official definition,
ANNEX 11 Air Traffic Services 2001
PANS-ATM Procedures for Air Navigation Services — Air Traffic Management [Doc 4444] 2001, 14th ed. (Amdt 3, 29/06/2004)
ANNEX 2 Rules of the Air 2005
ANNEX 4 Aeronautical Charts 2001, 10th ed. (Amdt 53, 12/07/2004)
Note 1.— The term 'ATS route' is used to mean variously, airway, advisory route, controlled or uncontrolled route, arrival or departure route, etc.
Note 2.— An ATS route is defined by route specifications which include an ATS route designator, the track to or from significant points (waypoints), distance between significant points, reporting requirements and, as determined by the appropriate ATS authority, the lowest safe altitude. (note source: ICAO)