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Visibility through windscreen along with front lighting system is one of the most important elements of road safety. Windscreen also provides the good visibility to driver to drive safely during night time. As per the rule windscreen visual light transmission should be minimum 70%. Windshields are made-up of tinted glass which produces light transmission varying from 70% to 95%. Windscreen installation is various from vehicle to vehicle, the visual light transmittance at different installation angle and its effect to the visibility are not fully understood. Vehicle headlamps and front fog lamps are evaluated for the illumination without consideration of driver's visibility with the combination of wind screen and its installation angle. This paper describes the effect of different ranges of tinted wind shield glass on driver's visibility at various installation angle of windshield along with the headlamp illumination.

Plastics (polymers) are nowadays clearly a material of choice in all application sectors including in Automobile sector. Automotive manufacturer have relived on new technology for vehicular accessories which are all made-up of different polymers like Acrylonitrile-Butadiene-Styrene (ABS), Poly Carbonates, Poly Methyl Methacrylate (PMMA), Acrylic, glass, resin etc. Although these components offer an impressive range of attractive properties, the effect of climatic conditions on the durability and performance of these materials is not fully understood. The durability, performance and rate of deterioration of these products are all significantly influenced by both the material composition, as well as the climatic conditions to which they are exposed. The degradation/ variation of the mechanical properties of the specimen treated at different environmental/ atmospheric conditions are a primary concern when recommending such a composite for particular use.

Weathering is the adverse response of a material or product to climate, often causing unwanted and premature product failure. The research and literature review shows that, in addition to the standard signaling devices, the retro-reflective marking is intended to increase the visibility (recognition) over a wide range of distances and for an easy identification of vehicles. The main characteristics of retro-reflective marking are Type of material, Coefficient of retro-reflection, Efficiency, Colour, Aging, Soiling, Shape and Pattern. Materials used for the retro reflective materials offer an impressive range of attractive properties, however the effect of weathering conditions on the durability and performance of these materials are not fully understood. The initial study conducted to provide degradation effect on retro reflective material due to weathering and its effect on road safety by simulating the weathering conditions in the laboratory as a part of accelerated tests.

The Light Emitting Diodes (LED) have been in use for various applications for the last 35 years. Recent developments in LEDs have made them a good contender against incandescent lamps in automobile applications with the specific advantages of very low power consumption, flexibility and simplicity in designing and styling of the lamps and long life. The lamps used in automotive applications experience a wide spectrum of environmental conditions of temperature, humidity, vibrations, corrosive atmosphere, etc. In this paper an attempt has been made to measure LED lamp performance in terms of light output and variation in colour under variable temperature conditions. The effect of vibration was also evaluated on the mechanical stability of the LED lamps. Some initial studies of light output at two levels of usage were also conducted.

The paper contains experimental results related to the driver's visibility and polarized headlighting system. The interpretation of visibility is done in terms of contrast in almost every situation. Results showing the variation of high and low beam intensity as a function of lateral displacement between the vehicles are presented. Parameters like headlamp mounting height and height of driver's eye point (DEP) have also been considered. A comparative study between polarized and conventional headlighting systems is performed under different situations. The performance metrics chosen for this purpose are visibility and glare.