From the begining man has had the need to get to one place to another.  Wheather for hunting, expanding or exploring.  Mans need to move about was necessary.  Man needed to improve on the way they traveled and make it more effiecient and faster.  Over time man has created and perfected different means of travel in all areas.  The have conquered the land, the sea and even the air byt creating machines to help get them from one point to another.