Prof. Victor Papanek talked in his book 'Design for the Real World', about how more than a ton of metal is used to move a 150 pound human from place to place.
Many of the National Labs in USA are working on developing self-contained suits for use by the National Security people for use in all kinds of emergencies.
Most of a car is designed to provide a micro-environment to the occupant.
The idea proposed is:
Can a simplified version of the special protection suit be used in conjunction with a skeletal, light weight transporter, which could even have only three wheels and the drive mechanism in an open execution?
Such a transporter may weigh less than a third of the present cars and probably run for quite a while on a tank of gas.
Reward: Less pollution. Saving non-renewable fossil fuels.