Can a car run using the REPULSIVE FORCE of a magnet?
Bullet train cars do. Some of the super trains that can approach speeds of 300 mph (or more) do so with magnetic levitation. They use a pulsed magnetic field in the track to propel the car forward, which is suspended off the track by its own magnetic field of a reversed polarity. These are trains though, running on special railroad tracks. To change the current road infrastructure to make Mag Lev cars would be a huge investment and not worth it. The track uses three sets of magnets; one to lift it and two to keep it stable and push it to the center of the track. Then by quickly pulsing the magnetic field to move it forward the train can be driven at tremendous speeds. It could be possible to lay a magnetic field under the road and put a repulsive magnetic field in the car; but to get one of enough power to make it worth while would be difficult and require a huge power source. A portable fusion reactor could supply it, but that is a long way off right now. According to Wikipedia:
