Operate by magnetic levitation. (The more it is used, the less the road network will cost)-have friction only with air (Ability to evacuate air in long-distance tunnels) so it consumes little and is extremely fast-Fully autonomous.
Operates by rental service.
In communication with all other cars in circulation, this avoids traffic congestion and organizes in convoy to save even more energy.-The network is entirely underground, allowing a circulation on several levels, and to release the surface.-100% electric because oil has become a scarce and expensive resource.-The occupants install themselves in a airtight bubble so as not to be exposed to pollution when they move in the city.