This Standard sets out the requirements for managing the stability of tracks for train operations in Australia. Track stability refers to the capacity of track to resist push out and buckling from compressive forces, curve pull-in and rail breaking from tension forces in the rails, due mainly to changes in rail temperature. This Standard examines factors affecting track stability for the design and maintenance of jointed, long and continuously welded rail. This Standard covers rail networks classified in AS 7630. Tram tracks, cane railway and monorail networks are not included.