Most of the large cities in the world have grown without plans, among that London is such a city. Their streets wind its way and there is no reason or order to its street numbering system. Indeed, no one but a practical taxi driver knows the whole of London. And before he gets his license, he must first tour the city for month, street by street, and then take a test to prove that whether he can find his way out. New York and Chicago grew in much the same way. They spread out like pouring water expanding at all directions.