With the long hours many cross country trucks on the road it
should be able to provide a self charging system for each and
let it charge as it moves down the highway. I’m not sure of
the details but I suspect they are being looked at. jmo
There are a few companies looking into that. I was involved with one seventeen years ago. To transfer the electric power, you need to either uses brushes or similar for DC, or coils for AC. Brushes get dirty too easily in a driving environment. So you can transfer with AC, but the problem lies in the coupling of the AC. If you use say 60 Hz, like your electric tooth brush charger does, then you need to be near stationary. If you are moving at highway speeds, the change in the electric field at 60 Hz is too slow. You’ll be long gone before you get any useful power transmitted.
You then have a choice, go to higher frequencies (MHz), or have the coils travel along side your car at your speed while you charge. Higher frequencies work, but high power transmission at MHz is expensive (think radio tower transmitters). Having the excitation coil travel along your car is physically possible, but mechanically complex. It needs to sync to your speed, it needs to be returned, and the wires powering it need to move as well. Not feasible.
Sending power by microwaves (GHz frequencies) has been demonstrated say to power airplanes from the ground, but it is quite inefficient. But I think that would be the most likely to work of all electrical options of the style you suggest.