To continue the transportation theme for today, as we had the new trains, now something that was planned to be built 30 years ago, back in 1970s. It was called the "super string transportation system" and was claimed to come to replace the existing rail road technologies.
The steel cords under great tension had to be stretched on the polls across all the country to support the high speed (up to 500 km/h - 300 mph) trains movement.
The project was pretty fast approved by Soviet government because of its cheap cost if compared to conventional rail roads - no need to prepare Earth surface - just put some polls and you are ready to go.
As always, it started with just sketches on paper, made in the manner it looked to be contemporary in 1970s.
The early prototypes looked more like military trucks that went rollercoaster.
They planned eventually to make them look more cool, but to test first principles of this new mean of transportation just regular cars were rebuilt in order to fit those string rails.