>With computer control, you eliminate the gap needed between cars - just hook it directly to the car in front, let them draft for better aerodynamics, and detac

>With computer control, you eliminate the gap needed between cars - just hook it directly to the car in front, let them draft for better aerodynamics, and detach when you need to make a turn, saving 70-100 feet of road space You will still need a way to turn off at speed, leaving you with interchanges at each potential detachment point taking up a lot of space. Grand Central Terminal in NYC has 44 platforms in 48 acres. Tens of Thousands of people per hour can switch between subway, regional rail, and bus lines, as well as access the surrounding city on foot, and access the on-site amenities and offices above. 700,000 people pass through daily. 10,000 people visit each day just to have lunch there. It works because the most space-efficient way to route people is to have them get out and walk. A tiny person-carrying vehicle will always need more space and supporting infrastructure than a person walking.