Almost all engineering invention begins with a need.

On the verge of my research,
I discovered that almost all invention begin with a need,an engineer, scientist in his basement recognizes a need and search for a way to satistify it.
Transportation is one example.
The whole history of transportation from the horse and buggy days to the present is full of cases where a new device or technology has come along to replace the old.
In this case,the new developing device answers the need for safe,inexpensive and reliable way better than the old one.
Better roads come along because authomobile were beginning to move at higher speeds because all -wether roads were needed.
 Another example is in communication.
The need for instantaneous comminications over a large distance brouht the telegraph which replaced the pony express.
Then the need for direct voice conversation gave rise to the telephone and communication has been blossoming ever since.