Mechanical energy is converted into electrical energy.
The turning of a coil in a magnetic field produces motional emfs .Since the component of the velocity perpendicular to the magnetic field changes sinusoidally with the rotation, the generated voltage is sinusoidal or AC.
This process can be described in terms of Faraday's law when you see that the rotation of the coil, magnetic flux changes through the coil and therefore generates a voltage.
The shaft of the generator is connected to the axis of the rolling speed breaker.
When the automobile crosses over the speed breaker the shaft is rotated.
Hence the rotating shaft of generator produces electrical energy.
The electrical energy generated is stored in power unit.
It can be implemented at metropolitan cities. so that more electric power is produced.
Arrangement of whole setup is easier.
The stored electricity could satisfy the daily requirement of electric power.