scope:

This standard provides all necessary design rules and associated assessment criteria as well as guidance concerning the design of information and the corresponding user interfaces of interoperable rolling stock. It considers the tasks the driver has to carry out and human factors. This standard describes how information is arranged and displayed. The standard does not apply to legacy ATP systems. If requirements in this standard are in conflict with the ERA DMI document (ERA_ERTMS_015560) the requirements of the ERA DMI document shall prevail for the CCD ETCS application. All assessments based on the normative requirements of this standard focus mainly on - symbols provided by Annex A, - arrangement of cab display areas conform with Figure 2 (generic organisation of information), - colours, fonts, - audible information. If a requirement contains an option, the choice of this option is purely up to the applicant. NOTE 1 The term 'option' is to be understood as a possibility that is usually expressed by the word 'can'. This standard covers the following aspects: - legibility and intelligibility of displayed information: general rules concerning the layout of information on the displays, including character size and spacing; - definition of harmonized colours, symbols, etc.; - definition of harmonized principles for the command interface (by physical or touchscreen buttons): size, symbols, reaction time, way to give feedback to the driver, etc.; - general arrangements (dialogue structure, sequences, layout philosophy, colour philosophy), symbols, audible information, data entry arrangements. NOTE 2: If this standard deals with how information can be given for operation and in degraded situations, it does not define operating rules and degraded situations. This standard does not request any safety requirement related with displayed information.