Mass transit is much more efficient to scale up because people are taking up less space and moving in a frequent coordinated pattern. Cars have a huge footprint

Mass transit is much more efficient to scale up because people are taking up less space and moving in a frequent coordinated pattern. Cars have a huge footprint: they take up extra space on the highway around a single occupant, they take extra space and time while the driver searches for parking, and they are left parked on some street or garage 90% of the time. You can never build "enough" roads, it just encourages more people to travel from further away. See induced demand: https://www.citylab.com/transportation/2018/09/citylab-university-induced-demand/569455/ https://www.citylab.com/transportation/2018/09/citylab-unive...