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Road crashes deserve to be a strategic issue for any country's public health and can lead to overall growth crisis, if not addressed properly. More than 90% of deaths on the world's roads occur in low and middle-income countries (21.5 and 19.5 per lakh of population, respectively) though they have just 48% of all registered vehicles. It is estimated that road traffic deaths will increase worldwide, from 0.99 million in 1990 to 2.34 million in 2020 (representing 3.4% of all deaths). India already accounts for about 9.5% of the total 1.2 million fatal accidents in the world. In 2007, 1.14 lakh people in India lost their lives in road mishaps-that's significantly higher than the 2006 road death figures in China, 89,455. One person dies at every 4.61 minutes in India for road crashes. Road deaths in India registered a sharp 6.1% rise between 2006 and 2007. The Planning Commission of India had assessed the social cost at 55,000 crore ( 550 billion) on account of road accidents in India.

A detailed comparative study to evaluate the increasing inaccuracy of photometric measurements of the extended light sources with the reduction in test distance has been proposed. Experimental data and detailed analysis of the results have been conducted to establish the proposal.

Bend lighting is achieved in two ways: static bend lighting and dynamic bend lighting. In both these cases the turning angle of the vehicle is required. Mostly this angle is calculated from the steering angle or in some systems through GPS. The first method has many drawbacks like it is dependent on the type of steering (mechanical, hydraulic or electrical) so it can not be a universal system. In the other method GPS based bend lighting is a very expensive solution and also GPS cannot be accessed from everywhere at all instances. In this publication the difference in speed of front wheels of a vehicle while turning is used. By using the speed of the front two wheels the actual turning angle of the vehicle can be calculated. This method is better suitable as it is not dependent on the type of steering: mechanical, electrical, hydraulic or even a joystick. It also is independent of the ratios between the steering wheel, steering shaft and the attached gear.