posted on Jul, 25 2011 @ 11:34 AM
Whenever the gravity manipulating technology gets here and can be mass manufactured into cars, I would't be surprised if we adopted some futurama type
commercial road system. In the city there would be say some electromagnetic markers that allowed free travel within those specific air space so those
could travel in the city faster, and they could not leave those markers by magnetic means. However, once the flying vehicle was able to leave the city
into more rural country side, the markers would be taken away, and the car would be free to fly within public airspace at the altitude the vehicle
allowed. And as soon as the car entered another city limit the markers would guide the vehicle back to designated safe flying parameters.
edit
on 25-7-2011 by juveous because: (no reason given)