Division Essential requirement 1.5:

‘The technical characteristics of the infrastructures and fixed installations must be compatible with each other and with those of the trains to be used on the trans-European high-speed rail system.

If adherence to these characteristics proves difficult on certain sections of the network, temporary solutions, which ensure compatibility in the future, may be implemented.’

This general requirement concerns the rolling stock fundamental criteria that correspond to the characteristics defined in Chapter 4 of this TSI.

Some temporary solutions are envisaged. They will be evoked in particular cases to allow proper operation on existing lines or will ultimately appear in the form of special characteristics within the ‘infrastructure register’.