A bit of history:
In November 1976, the November issue of the magazine “Young Technician” on page 62 published a letter from the young (technician?) Leoni Stezhko, who
suggested placing advertisements in the subway tunnels (frames placed along the tunnel). The venerable technicians rejected Leni’s idea with these words: “A man sat on the subway, drove two or three stops and saw a piece of film without a beginning, without end.”
Nowadays, the idea has been developed.
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As my Japanese resident
reports , an interesting experiment is being conducted in the Tokyo subway between the Tameike-sanno and Akasaka-mitsuke stations between Tameike-sanno and Akasaka-mitsuke stations. Driving through this area, you look out the window and see there so-called. "Tunnel advertising". It looks
like this .

The technology was developed by the American company Submedia, which had time to introduce it in a number of metro lines of the United States and some Latin American countries.
The essence of the idea is quite simple: on the walls of the tunnel screens are hung on which special raskadannye videos are displayed. Screens are illuminated with brief strobe flashes when a subway car passes by. It creates a complete illusion of a moving picture.
By the way, there are
other interesting ads in the Japanese subway.