Big tube in the air rests on pylons / support towers. Maybe goes along a highway. Vehicle inside the tube has batteries for running a compressor. It pumps air away from its front to reduce air resistance, pumps below for suspension and behind. High subsonic speed (~700 mi/hr, 1100 km/hr). Accelerated by occasional linear induction motors on the tube, like a maglev train. Vehicle estimated to cost millions, tube estimated to cost billions. Conventional rails cost tens of billions. That's all from the abstract, much more inside.