Exploitation research of tram’s head lighting
- Piotr Tomczuk
- Kategoria: Pozostałe zagadnienia
Abstract: The article presents the current state of tram’s front lighting. Qualitative analysis has been conducted of presently used light beams of low beam lights with the use of image analyzer of CCD camera for luminance measurement. A method of luminance measurement on photometric screen has been described. Comparative results have been presented of luminance measurement in measurement points and areas on the borderline of light and shade, and on the glare line of a tram driver coming from the opposite direction.
1. INTRODUCTION
The factor influencing driving safety of a track vehicle is the quality and state of tram’s head lighting. Proper distribution of a light beam within the area of a vehicle’s foreground plays a decisive role in the perception of luminous sensations by the tram driver.
Appropriately shaped light beam conditions proper visibility from the tram driver’s seat and facilitates correct assessment of traffic situations connected with the behaviour of other road traffic participants.
Review of Polish and worldwide literature within the field of foreground lighting of track vehicles indicates a scarce number of publications concerning systemic approach to this issue. Poland lacks legislative solutions dedicated to this field. Current requirements concerning technical parameters of lighting solutions used in tram vehicles are included in the Directive of Minister of Infrastructure [1], [2].
Requirements included in the abovementioned directives contain only general information, which can be used when drawing up a method of quality assessment of tram’s lighting. What they are lacking in is detailed measurement guidelines taking into account the specificity of tram’s foreground lighting in urban traffic conditions. Guidelines included in the abovementioned directives stipulate only borderline values of luminous flux density and ranges of particular light beams of a tram. There is a possibility of defining more detailed requirements, for example, by defining a photometric measurement
screen for this group of vehicles. Therefore, it is justifiable to make an attempt at application of modern photometric tools in order to optimise the quality of light beams used in tram’s front lighting.
It should be mentioned that according to the knowledge of the author of the present paper, there is no research being currently conducted on the head lighting of tram vehicles either in Poland or in Europe. (...)
The factor influencing driving safety of a track vehicle is the quality and state of tram’s head lighting. Proper distribution of a light beam within the area of a vehicle’s foreground plays a decisive role in the perception of luminous sensations by the tram driver.
Appropriately shaped light beam conditions proper visibility from the tram driver’s seat and facilitates correct assessment of traffic situations connected with the behaviour of other road traffic participants.
Review of Polish and worldwide literature within the field of foreground lighting of track vehicles indicates a scarce number of publications concerning systemic approach to this issue. Poland lacks legislative solutions dedicated to this field. Current requirements concerning technical parameters of lighting solutions used in tram vehicles are included in the Directive of Minister of Infrastructure [1], [2].
Requirements included in the abovementioned directives contain only general information, which can be used when drawing up a method of quality assessment of tram’s lighting. What they are lacking in is detailed measurement guidelines taking into account the specificity of tram’s foreground lighting in urban traffic conditions. Guidelines included in the abovementioned directives stipulate only borderline values of luminous flux density and ranges of particular light beams of a tram. There is a possibility of defining more detailed requirements, for example, by defining a photometric measurement
screen for this group of vehicles. Therefore, it is justifiable to make an attempt at application of modern photometric tools in order to optimise the quality of light beams used in tram’s front lighting.
It should be mentioned that according to the knowledge of the author of the present paper, there is no research being currently conducted on the head lighting of tram vehicles either in Poland or in Europe. (...)
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Źródło: Czasopismo Logistyka
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