Sorry - I'm afraid you were wrong on almost all, if not all, counts.

Tunnel is pressurised - wrong.

Use of the word "loop" means that something is 'recycled' - wrong.

Parallel tracks used for acceleration - wrong.

Carriages help push each other - wrong.

Internet analogy - wrong.

Summary: scaled up pneumatic tube - wrong.

Really? I guess you got the tube part right.