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Road surface, payload and speed of the vehicle are important parameters, which affect the life of a vehicle. This paper discusses the relationship between road/load/speed and damage to the vehicle as a whole and automotive structure in particular. This will help the designer to understand non-linear relationship between different service conditions and damage and to arrive at realistic input spindle loads for design considerations. This will also help the evaluation engineer in the development of durability cycle by correlating different environmental conditions with actual service conditions.

The Indian automotive industry today stands as the most vibrant, modern and upbeat automobile market in the world and is the current focus of venture for almost every leading vehicle manufacturer in the world. New variants launched in Indian market are tested by instrumenting it with different sensors and running it on proving ground and public roads and further validated in the laboratory. These testing practices may be derived from the market needs and driving pattern of that region and trying to adopt for Indian condition. The driving characteristics obtained from other markets may not represent Indian driving patterns. Similarly Indian vehicle manufacturer also need to know updated driving characteristics, which is very much dynamic and changing with new type of roads/driving habit etc. There is a need to tune the vehicle for realistic Indian conditions and driving pattern.