Passing beam visibility distance - technical possibilities, legal requirements and road safety

• Autorzy: Targosiński T.
• Języki publikacji: EN

Abstrakty

EN

Night-time visibility is essential for road traffic safety. It depends mostly on quantity of light falling on the objects important to be seen to avoid collision. The relatively simple and easily understood criterion for quality of passing beam is visibility distance. In fact visibility distance of driver using headlamps is a much more complicated function of many factors such as design of headlamp, light source used, mounting height, aiming, change of beam pattern inclination during change of vehicle load. From point of view of legal requirements it is important to meet all requirements concerning all mentioned factors. But the problem is that there are separate legal requirements for light sources, headlighting systems and mounting conditions on vehicle. Final visibility distance is significantly influenced by coincidence of all this performances but also by visual possibilities of driver and road conditions. The process of requirements creation is complicated. A number of experts work on them for a long time. It is influenced by technical progress, market needs, level of knowledge and experience. . In this paper author describes influence of important factors for present state of possible and real visibility distances in dependence on technical design, kind of light source used and way of creation of type approval requirements and propose improved concept for aiming and levelling.

Słowa kluczowe

EN

traffic safety; visibility; headlighting

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2011
• Tom: Vol. 18, No. 4
• Strony: 511--517
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Targosiński T.

• Motor Transport Institute Jagiellońska Street 80, 03-301 Warszawa, Poland tel.:[phone] ext.157, fax: [phone],

Bibliografia

• [1] Automatic Static Headlamp Levelling Implications of Mandatory Fitment to all Vehicles The Way Forward A first evaluation by GTB, Informal Document No. GRE-65-17, 65th GRE, Geneva, 28-31 March 2011.
• [2] Uniform Provisions Concerning the Approval of Adaptive Front Lighting Systems (AFS) for Motor Vehicles, UN ECE Regulation No. 123.
• [3] Uniform Provisions Concerning the Approval of Filament Lamps for Use in Approved Lamp Units on Power-Driven Vehicles and of their Trailers, UN ECE Regulation No. 37.
• [4] Uniform Provisions Concerning the Approval of Gas-Discharge Light Sources for Use in Approved Gas-Discharge Lamp Units of Power-Driven Vehicles, UN ECE Regulation No. 37.
• [5] Uniform provisions concerning the approval of motor vehicle headlamps emitting an asymmetrical passing beam or a driving beam or both and equipped with filament lamps and/or light-emitting diode (LED) modules, UN ECE Regulation No. 112.
• [6] Uniform Provisions Concerning the Approval of Motor Vehicle Headlamps Emitting an Asymmetrical Passing Beam and/or a Driving Beam and Equipped with Filament Lamps of Categories R2 and/or Hs1, UN ECE Regulation No. 1.
• [7] Uniform Provisions Concerning the Approval of Motor Vehicle Headlamps Equipped With Gas-Discharge Light Sources, UN ECE Regulation No. 98.
• [8] Uniform Provisions Concerning the Approval of Vehicles with Regard to the Installation of Lighting and Light-Signalling Devices, UN ECE Regulation No. 48.
• [9] Diem, C., Schmidt-Clausen, H. J., Headlamp Performance in Traffic Situations, Symposium Progress in Automobile Lighting, PAL’97, Darmstadt 1997.
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