This document is applicable to vehicles operating on tram networks. This document gives design requirements and guidance in order to ensure visibility and operability of screens, controls and indicators in the cab in all operating conditions (day, night, natural or artificial lighting). It covers four aspects: the characteristics of the displays, controls and indicators in order to ensure proper visibility: i.e. range of luminance and contrast as well as the possibility of adjustment of perceived brightness; the requirements for the location of the displays, keyboards, controls and indicators in the cab and on the driver s desk: i.e. position, angle of visibility, etc. with consideration of the normal driving position and the working environment (windscreen, natural or artificial lighting in the cab, unwanted glare and reflections, etc.); the characteristics and requirements for the location of microphones and loudspeakers; design of symbols. NOTE All element numbers within the text refer to Table B.1. This document does not apply to refurbishment of existing vehicles. This document is not intended to be applicable to driver's auxiliary desk, except for 5.3.10, Clauses 6, 8, 9 and Tables B.1, C.1.