Design a numatic cylinder1

Dear sir, task : design an pneumatic system to store pressure from car weight and release the compress air to push generator. I didn't set the price yet , but I definitely will not let you down as long as all the requirement is full-fill Detail to be discuss via email, your help would be "greatly appreciated" . The purpose of this project is to design an alternative energy system which will convert the kinetic energy from moving vehicles and generate electrical power , All i need is : 1) design of pneumatic ( size of piston, calculation/estimate outcome energy with respect to number of car pass-by, ---->which included flow rate of compress air, type of generator ) 2) once estimate energy decided , need design a charging circuit ( boost converter) 3)( optional ) code microcontroller to release the solenoid valve when the pressure is full dont stress , you got weeks to work on it , but I'll like to follow the progress if that's possible Moreover , I am attaching some more details . Please, find the attachment & feel free if you have any query.