Let's make Superbus Trains

The goal is to modify the bus above so they can be tethered in a rubber wheeled train. We need to convert one of these to a diesel-electric generator, a locomotive. Then we run the tether down each individual Superbus and feed them power. We can remove three quarters of the battery weight in each Bus in doing so. Replace the cockpit with autonomous control.

Great, done.  Thus when Nevada approves the auto bots we can start hauling passengers to casinos in mass quantities at high speed.