One of the most interesting problems in mobility is that supply and demand are rarely synchronized perfectly. A vehicle may have available capacity when nobody nearby needs it. Later, the same demand might appear when that capacity is no longer available. This makes transportation partly a coordination problem. That's where @MovitOn_P2P gets interesting. A peer-to-peer mobility model can potentially connect people who have transportation capacity with people who need it, creating better utilization of resources that already exist. The important idea isn't simply "more rides." It's better utilization. If existing vehicles, seats, and routes can be coordinated more efficiently, the system can potentially generate additional value without requiring every improvement to come from building new infrastructure. Sometimes the biggest efficiency gain comes from connecting what already exists.