Currently all types of public transportation range from very cheap very expensive. Could the Hyperloop be the Uber of the train system? iE cheaper than taxi’s? Could cost be determined by energy/co2 expended? Maybe the first Hyperloop rides will be really expensive because the PV will not have paid for the system yet but at least it will be along the top of the Hyperloop. Why not have trams that are electrically powered been retro fitted with PV along the tram line? Why aren’t these systems more sustainable?