This document specifies the minimum requirements for track geometry measuring principles and systems in order to produce comparable results when measuring the same track. It applies to all measuring systems, attended or unattended, fitted on any vehicle, except those systems defined in EN 13848-3 and EN 13848-4. Only systems put into service after the standard comes into force are concerned. This document doesn't define the requirements for vehicle acceptance. This document does not apply to measuring systems dedicated to Urban Rail Systems.