"Kinetic Air Light Curtain" consists of a grouping of 5,280 propellers laid out on a grid system that changes configurations as the train passes. The propellers are made of reflective stainless steel and are 12-inches in diameter. The work, which includes blue fluorescent lighting, encompasses the entire mile of the train tunnel journey. The propellers are activated by physical phenomena already existing in the tunnel, including light from the train and wind generated by the movement of the train.