Proposal of lighting requirements for lighting devices in adaptive front lighting system of trams head lights

The factor influencing the safety of a moving track vehicle is the quality and state of tram's head lighting. Appropriate light distribution within the area of tram's foreground plays a decisive role in the perception of luminous sensations by the tram driver. A properly shaped light beam conditions appropriate visibility from the tram driver's seat and facilitates correct assessment of traffic situations connected with the behaviour of other road traffic participants. The article proposes and discusses application of AFS system in trams particularly accounting for proposals of new lighting requirements for tram's head lighting devices. The author of the present paper justifies the need for implementing new solutions for lighting of tram's foreground in order to improve the quality of lighting taking into account various road traffic situations. For this purpose, new normative guidelines have been proposed allowing for assessment of lighting devices installed on trams, which directly influence the quality of tram's foreground lighting. Proposal for AFS system components for tram, measurement screen for examining projectors of symmetrical low beam lights, for examining projectors of symmetrical main lights, for examining the right projector of curve light and for examining the left projector of curve light are presented in the paper.