This will definitely increase fuel consumption (like if you care if you have spinners!), but it's an easy way to provide power wirelessly right where it is needed: either for LEDs on the spinners for some cool light show or, even better, for small motors that would rotate spinners when the vehicle is stopped, so even at a long train-crossing your spinners will spin!

For the latter option the power-generating function should only work when accelerating, but if you're after the light show and ready to sacrifice some spinning time for it, the braking phase can also be used.