Consider – Compressed air transport for the world.

Cities are growing rapidly. The world cannot sustain the use of fossil fuels, land, and CO2 emissions caused by current passenger and freight transport.

Existing passenger and freight rail services divide communities, causing dangerous and expensive traffic congestion e.g. at level crossings. Very fast trains (VFT) are extremely expensive, infrequent and slow. Short haul aircraft (SHA) require airports near cities. Maglev is expensive.

Decentralisation requires frequent, quick, cheap, silent, non-polluting, underground access to city centres for work and recreation.

The transport system that solves these problems is BETTS.