Purpose based vehicles:
1.A front wheel drive car with power assisted steering on bad roads become a safety risk.
2.Requirements for an owner driven vehicle has to be different as compared to the hired driver driven vehicle
3.A truck meant for use as a transport vehicle in a fleet of vehicles - driven by contact drivers will be different - in comfort and system complexity - as compared to an owner driven truck
4.A truck meant for high speed highways has to be different as compared to truck where load carrying capacity - not speed - becomes important.
5.Automobiles in normal plain areas compared to that of hilly areas - what all are the design changes required, if same vehicle is used in both the areas what are the difficulties arises?