A witty friend of mine, a hydrologist and a veteran in river management, once remarked: "You know, nature's own engineering is like the realm of a woman's mind, nobody knows when and how it is going to address in our own sense. For instance, think of the atmosphere. Scientists have developed so many mathematical models to understand and workout atmospheric events, but on many occasions in the scale of time and space they do not work". In this regard development and management of roads can be another example. On the basis of different terrains, climates and traffic mobility, scientist and engineers have developed various models of roads, many of them have been tried also with satisfaction, even then in some cases they become unreliable in the scale of time. This is due to nature's own way of activities which in many cases cannot be envisaged well in advance.
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