Automated car fleets work well for suburbs. But past a certain point, heavy rail train subways have far more throughput than the equivalent amount of cars. Lo

Automated car fleets work well for suburbs. But past a certain point, heavy rail train subways have far more throughput than the equivalent amount of cars. Look at this image for example: http://imgur.com/gallery/v3ff7FY http://imgur.com/gallery/v3ff7FY Building & maintaining roads and highways does take a lot of money too. Building new roads vs building new railroad track on new land isn't that much different cost wise.