Hyperloop - A subway network working on magnetic rails in depressurised steel tunnels
The magnetic rails allows the pods to levitate without mechanical friction. The depressurised steel tunnels reduces the air resistance to a minimum. These two properties enables extremely energy-efficient operations.
History - Hyperloop evolved from the vacuum train and the maglev train
South African - American entrepreneur
presented the Hyperloop in the White Paper 2013. An open source project that was based upon the vacuum train and maglev ideas.