Emissions would be a problem (until Tesla takes over the world.) The energy required to sustain 90-100mph is mostly a factor of aerodynamics. If the distance b

Emissions would be a problem (until Tesla takes over the world.) The energy required to sustain 90-100mph is mostly a factor of aerodynamics. If the distance between the cars could be kept sufficiently short like perhaps a few inches only then maybe. High-speed trains have flush coupling between the streamlines cars to deal with that. The incremental resistance from length is almost negligible and so they can maintain 200 mph speeds. I wish north america would embrace high-speed rail like in Europe.