UIC 715-1:2004-05

UIC Leaflet 715-1 sets out the general principles relating to the continuous measurement of the geometrical quality of the track and of switch and crossing work: the frequency of measurement, limiting values, analysis and preparation of programmes of work. The measurements involve the use of digital procedures and, in conjunction with other observations, is based on determining the requirement in terms of tamping and lining/levelling work. The standard of geometrical quality to be achieved is defined as a function of the running speed, the desired level of comfort and the limiting intervention thresholds. With a view to optimising maintenance costs the work needs to be scheduled in the light of the actual condition of the track and not just systematically: the leaflet provides recommendations concerning the length of the sections to be dealt with according to the defects observed.