Your proposal, while interesting, does not go far enough. Given that cargo has weight, the trucks should have NEGATIVE weight to compensate for the cargo.
Of course, this will require that unloaded trucks be tethered down, lest they fly up into the stratosphere.
Thinking like this is dangerous to the established trucking industry. Everyone will want a zero weight truck! One question, will these levitation trucks fit under overpasses? 🤔