Austro-Daimler » A-Zug
On December 17, 1908 Ferdinand Porsche offered the project of active road-train with gas-electric propulsor. It comprised of two-axle tractor with 100 h.p. engine and 93 kWt power generator whose current flow came to tractor's rear wheels electric motors; and 5 trailer with all axles steerable. The road train later known as "A-Zug" could make 18km/h perfectly fitting highway spirals in mountains. That's why it was sent to Bosnia and Herzegovina annexed by Austria-Hungary at once.