This is video entertainmenr or advertising that can be viewed by commuters on a subway train while pasilng through a dark tunnel. The effect is similar to driving through an old covered wooden bridge and seeing the landscape through the gaps between the boards.  

The images are streak scanned while looking through the moving train windows. The images are bright and can be changed at an operator's desk.

HinesLab subway signage uses vertical stripes of light that are viewed through transparent LCD video screens.  Horizontal motion of the train causes the images to be streak scanned.  Persistence of vision causes the image to appear to follow the train just outside the window.  

Each light box has multiple images with vertical back lights.  The image brightness is like viewing a bare light bulb filament through a 35mm Kodachrome slide.  

Forward motion of the train causes horizontal motion parallax of the vertical light strips behind the screen to scan the image.  Perceptual image lag leaves a streak-scanned image in the viewer's eye/mind so that the sign appears to hang just outside the train window.  LED's are brighter, produce much less heat, have a more natural color balance and have much longer life than fluorescent lamps.  

Best of all, the image can be changed at the computer without going into the tunnel.  Play one ad for the riders getting off work at 5 PM.  Play a different ad at 7 PM for people going to the ball game.  

U.S. Patent 7,827,712
U.S. Patent 7,870,686
https://www.hineslab.com/opto-mechanical-projects/subway-tunnel-signage/