Aiden, If Alan's idea was to have coils in the roadway and as a car
passed over they would be energised in turn then that would be
practical but very expensive. However it does not avoid the radio interference problem.
These coils to be able to transfer a usable
amount of power operate at around the 100Khz range and because they
are not tightly coupled leak a lot of the power. which include harmonics.
Each coil would need its own high power oscillator, as piping the
power over long distances would be not on.