If you look up Nikola Tesla and his experiments into electromagnetism, he had blueprints for a ‘hovering car’, just like the type you see in many sci fi movies, of course, these plans along with others are still kept highly classified by the US Govt.
Teslas hover car was shot down by the powers that be, when they told him there was no way to meter usage of the earths electro magnetics, so people would not have to pay for any fuel to use these things, his hover car was also mostly solid state, not many moving parts, that was likely to give them a very long lifespan with not many repairs needed…if this was released to the public, too many industries would go out business…its a shame, but greed comes before progress in this case at least.