This system won't work for Parked Cars...since the motion of the car is crucial to the transfer of energy.
If you have a magnetic field and move a coil through it, because of the motion, a current is induced in the coil. That is the principle they want to use.
They'll generate the magnetic fields not with magnets, but by another coil embedded in the road through which they run an electric current. the next stage needs to be efficient static charging.