This leaflet completes the UIC Leaflet 761 with information to be considered when installing a level crossing system on lines with speeds above 120 km/h. Thus the leaflet gives an overview of methods which may be used by railways in such a case. An introductory part justifies the need to limit the number of level crossings on lines operated at speeds above 120 km/h. The main section provides conditions for warning signals (lights, barriers) that should be taken into consideration. The last section makes recommendations in case of a connection with a traffic control center and for optimizing the warning time. This leaflet has no mandatory status, in case of discrepancy with values indicated in the present leaflet, national low limites are binding.