the magnets don't directly move the vehicle, the field it generates is just measured by the sensor on the car to be able to get reliably accurate position data iirc
gps definitely can't provide that level of accuracy reliably
This is a self driving tram provided by the Korean Railroad Research Institute to this research project. As so often, these “autonomous” vehicles merely follow a special trail that is embedded in the tarmac, often with an indicator colour on top. The rail-ish thing you mentioned is just too far away from the vehicle, and there’s only one.
So only one question remains: is it a car? Maybe.